Rin didn't remember going to bed with anyone next to him, but that was definitely a Demon King curled around him when he woke blearily to faint sunlight and extra warmth radiating from a body behind him.

Amaimon, popping up yet again in an unexpected place. This time, he was spooning Rin from behind. His arm was wrapped around the half-demon and Rin's tail was wrapped around Amaimon's leg snugly. Rin made a confused noise, still not fully awake, and the Earth King shifted.

"Are you awake, Rin?" Amaimon ran his claws lightly along the teen's scalp on the side of his head not smushed into the pillow.

Rin mumbled out a mess of a sentence that was supposed to be asking the Earth King why he was here and in Rin's bed with him and the Earth King huffed in amusement. Amaimon thankfully still seemed to understand what he was asking and answered accordingly. "You are very sad, Prince."

Rin let out a self- deprecating laugh. "Yeah, I know. Thanks for bringing it up first thing in the morning." He croaked.

"You shouldn't be sad." Amaimon told him, like he was scolding a child.

"No? Why's that?" Rin was talking to him like an amused adult spoke to a child. Amaimon could tell Rin didn't believe him, but it was kind of hard to pay attention to what he was saying when Rin's voice was rough and an octave deeper than usual. Amaimon shook off the urge to kiss down that pretty neck until Rin's voice was rough from something else and answered the question.

"You should have everything. Instead, you have nothing. It's pathetic." The Earth King huffed. Rin snorted.

"Trust me, I know. Everyone likes to remind me of that whenever they can." He grumbled.

"No, I mean–ugh!" Amaimon gave up frustratedly and rolled the boy over to face him. He pulled Rin's face to his to initiate a kiss not unlike the ones the day before. Rin hummed and wrapped an arm around him, sighing into the kiss contentedly. He liked this method much better than talking.

Oh, I see. He reads people through actions. That's actually much easier for both of us.

He rolled them over so he was straddling Rin as the kiss deepened. Rin let out a muffled moan as their tongues intertwined and slid languidly against each other. Amaimon pushed a hand up the half-demon's shirt, feeling up the solid muscles underneath perfect, unmarked skin. He ran his claws lightly along the muscles and felt Rin shiver beneath him. The half-demon breathed almost pure heat into Amaimon's mouth and the Earth King felt his body shudder.

Rin's core temperature naturally ran hotter than a human's and the heat was already building under Amaimon's touch. He wondered if he could get Rin to radiate heat while they played. Could he make the boy literally combust? Amaimon purred at the thought. He'd love to see a sight as perfect as Rin losing control of his flames at his hands.

This was intoxicating to both of them–Rin because he craved the attention and touch, and Amaimon for the intimate contact with his new favorite person. His tail slid out from around his waist to wrap around Rin's arm. Rin's tail was wrapped around the Earth King's torso, slithering up his shirt and leaving behind  a strange sensation as the fur brushed over his skin.

They separated, only for Amaimon to move to Rin's neck and mouth at a spot there. Rin let out a deep purr at the action. Amaimon could feel the vibrations from the sound in the chest under him. Rin's arms were wrapped around him, keeping the demon close to him.

"Humans are cruel. Why stay with them? Because they taught you to be like them even though you're not?" Amaimon breathed against his neck. Rin whimpered at the words that hit way too close to home. His resolve was already fragile after everything he'd been through with humans.

Amaimon kissed down his neck and sucked a mark into his collarbone, licking over it after. Rin tangled a hand in the hair at the back of Amaimon's head, squirming under him deliciously and encouraging him to keep doing what he was doing.

"Why not be with us? You belong with us. You'll never be exactly like us or exactly like them, but we'll raise you up and love you more than they ever will." He murmured breathlessly, directly into the teen's ear, nibbling on it just for effect. Rin's tail tightened around him and he knew he had the half-demon's full attention.

"They don't love you like you love them. Mephisto says demons don't feel love, but that's just him running from things to get attached to. I'll love you. He'll love you. Gehenna will love you–if you just give us a chance." He placed a kiss on Rin's lips and the half- demon whined helplessly into the kiss, tail writhing unsurely against Amaimon's skin. As immature as the action seemed when other demons did it, Amaimon found the movements of Rin's tail cute, because he was so expressive and sweet.

Amaimon shushed him, brushing away a stray tear and kissing his cheeks tenderly. He'd observed humans for thousands of years on his visits back and forth between Assiah and Gehenna. He'd seen humans do many things that held meaning to them, but made no sense to him–little movements, actions, signs of affection. He'd thought the information was useless to him, but he was glad for it now, as Rin seemed to enjoy being pampered with it. Quite sad for the Crown Prince of an entire race.

"What could you give me that they haven't?" Rin whispered hoarsely. Ah yes, his resolve to stay loyal to the humans was crumbling. Alas, that was a very easy question to answer.

"Everything. A home, happiness, acceptance, love. We can teach you everything you want to know about Gehenna. We can teach you how to do what you want. We can teach you how to be free like us. Mephisto may work under those humans, but he will never truly be held down by them. And I have never let anything stop me from getting what I want since I first formed." Amaimon's words were honeyed, but they were not lies. If he could convince Rin, they really could be powerful together. Rin could be happier, stronger, better. He could be free. And oh how Amaimon longed to see Rin wild and free, an unstoppable force that bowed to nothing and no one.

A burn curled in the Earth King's gut that he hadn't felt since the first two hundred years of his life when he'd mingled with humans while trying to figure out how to live in a physical form. It curled deep inside him and set his body on fire. He wanted Rin. He wanted all of Rin–heart, body, and soul.

He pulled Rin into another deep kiss where their tongues tangled and Amaimon's tail moved to twist around Rin's and have them writhe together in a hypnotic, sensual dance. Rin gave a cry and bucked his hips up into Amaimon's as he cried out helplessly against the unexpected onslaught of pleasure from his tail.

"Ahn~! A- Amaimon~!" Rin moaned and the sounds were so sweet in the Demon King's ears that he grinded down against Rin to hear more.

"Yes, you know my name very well now, don't you? No more playing guessing games to remember me, Prince. You're going to remember my name very well once I've made you scream it enough." The demon purred, slitted eyes taking in the sight before him.

Rin had a bright red flush across his cheeks and the points of his ears. He panted and bucked under Amaimon, begging for more of the delicious pleasure the Demon King was giving him, for more of the attention he craved so much. Rin's body temperature was rising rapidly, heat beginning to come off of him in pulses that matched his heartbeat the more riled up he got.

"Is it hard to hold them back?" Amaimon crooned to the half-demon. "Your flames~?" He grinded down and bit a mark into Rin's neck at the same time, getting a loud cry out of the boy.

"Nnnn, don't~!" Rin pleaded, bucking up into him.

"Don't what, Rin?" Amaimon wondered, knowing exactly what he meant.

"Don't do that~I'll lose control!" Rin shuddered under him, tail writhing against Amaimon's.

"You should. Lose it. Let it break free of the control you constantly hold yourself under. You won't burn anything. I know you won't. You have total control. You could burst into flames at this very moment and you'd only look beautiful, perfect–no burned sheets in sight." Amaimon insisted, purring against Rin as the half- demon mouthed at his neck and left a mark of his own there, biting down harshly and drawing a moan from the Earth King.

"No....I can't...." Rin denied, hiding his face in Amaimon's neck near the bite.

"Yes, you can. Lose it. Give in. Let them loose, let it consume you. You'll be so perfect, covered in those beautiful blue flames." The demon groaned, nipping at a pointed ear. Rin bucked up against him with a strained moan.

"Cum for me, Rin~" Amaimon growled lowly in his ear.

Rin arched his back as he came, blue fire flaring to life around him in a beautiful explosion, a long, low moan falling from his lips. It was a sound that was more satisfying than any music Amaimon had ever heard.

He growled in response and came himself, rolling his hips in slow, smooth dips until Rin whimpered from overstimulation.

"Nnn~too much, too much, Amai...." He gasped breathlessly, pushing weakly at the Demon King. His bones were made of jelly and he had no strength after that mind-blowing release.

"Perfect." The Earth King nuzzled into Rin's neck before moving back up to kiss him, long and lazy and slow.

"Hm, I think a bath is in order." Mephisto had popped into the room near the end, but neither had noticed–they'd been too invested in each other. "Did you two enjoy yourselves?" He grinned at them.

Rin was too gone in his orgasmic bliss to care at the moment, raising a hand to flip the Time Lord off.

"Did you enjoy watching us, creep?" He grumbled. Amaimon's huff of laughter was stifled in his chest as the Time Lord twitched.

"Yes, it was quite a lovely show." He answered he answered pettily. He snapped and they were suddenly in the bathroom. Rin almost fell over, but was thankfully caught by Amaimon.

While Mephisto filled the tub and got the water to the perfect temperature, Amaimon undressed himself and Rin. He purred and pushed Rin against the wall, dropping to his knees to clean the cum off of Rin's dick. The half-demon moaned and buried a hand in the green hair.

Mephisto turned from putting scented bubbles into the water and scoffed. "When did you attach yourself so securely to Rin? You've been free for only a week and you have no self-control around him. Have you suddenly forgotten what restraint is?" The Time Lord riled his eyes. "Honestly, Amaimon...." 

Amaimon pulled off. "I do know what restraint is, but do I really need it right now?" He responded cheekily. Rin was starting to get used to recognizing the changes in Amaimon's tone of voice instead of looking at his face to tell what he was feeling. That expression just didn't change.

"Besides, you're enjoying this too, or you wouldn't be here." The Earth King pointed out. Mephisto said nothing in response, watching the Earth King clean off the heavily blushing half-demon before pulling them into the bath with him.

Rin sunk in up to his chin, shivering.

"Hah! Did you expel all your extra heat with Amaimon earlier?" The King of Time snorted at Rin. The half- demon only hummed in response.

"Oh come now, you have to wash yourself, you can't just sit in here for an hour until the bubbles are gone and the water starts getting cold." He rolled his eyes.

"You've done it before. You even spend two hours in baths sometimes." Amaimon said.

"That's because you're insatiable and don't stop bothering me until I've tired you out so I can actually wash." Mephisto shot back. Rin snorted.

"That was a self call-out if I ever heard one. Way to be subtle, guys."

"When have I ever been subtle, Rin? And I figured you of all people would figure it out. It's a demon sort of thing." Mephisto waved a hand dismissively.

"Is it a demon thing to be able to see it on just demons, or humans too? Cuz I've just been able to notice things from the beginning." Rin wondered.

"No, that's your empathy." Amaimon answered. Both curious gazes snapped to him.

"Oh, please. He wouldn't have responded that well to me if he didn't understand what my intentions were. He felt that I was curious, so he gave me answers before. This morning, he must have felt my intent to please him and responded better than I expected." Amaimon explained like it was obvious.

Rin shrugged while Mephisto looked deep in thought. Rin had learned to just go with the flow a long time ago and didn't need to ponder things too much to understand them. Understanding would come in due time if he really needed it.

Mephisto brushed it off for the moment and summoned his own bathroom products. He squirted shampoo into his open palm and moved towards Rin. The half-demon tensed when he began lathering it in his hair, but relaxed after a moment.

"M'not used to people touching me. And I especially didn't expect you if all people to be doing it." He muttered.

"No? You seem the type to hang on everyone you're close to." Mephisto said inquiringly, ignoring the second part of the question.

"I would, but none of them are around me that much anymore and I don't wanna push it." He sighed. "Even at lunch, everyone does their own thing now. Izumo is usually insulting Shiemi and Shiemi just doesn't care and laughs about it, Shima's off doing "spy things" or being a pervert, Suguro is Lightning's slave/mom now, Yukio is off avoiding me or being a prick on missions, and Konekomeru is just a quiet guy. Oh, and Shura's off getting drunk somewhere and separating herself from us." He listed off resignedly.

Mephisto winced. "My apologies for bringing it up." It was obviously a sore subject.

"Meh, this is still better than when I was little. I can handle it." He shrugged. Amaimon wrapped his arms around the teen, kissing his left shoulder.

"You'll be much happier with us you know." He placed more small kisses on Rin's shoulders(he didn't know Rin had cute, faint little freckles, but now he wanted to explore them all.

"I can't deny that. You would be happier with us than with the humans. There seems to be a continuous pattern of mistreatment towards you from them." Mephisto agreed as he used an unnecessarily fancy cup to scoop up water and wash the shampoo out of the boy's hair and his own. Rin purred at the feeling of the conditioner being worked into his scalp next. Amaimon let out a resounding purr and Mephisto chuckled.

"Well this is a sight to behold." Yukio stood in the doorway, a cold glare on his face. Rin's blissful expression dropped into a flat one. He looked way too done for this situation and both Demon Kings snickered at the impending drama that was about to occur.

"You don't use the place, so I'll just do what I want. This dorm was meant to house me, after all." Rin shrugged. Amaimon's tail curled around his wrist and hand under the water, as if to hold it.

"Me being absent doesn't give you an excuse to be a reckless brat, Rin!" Yukio snapped. "You have responsibilities!"

"And you do too. Since you're pretty much married to yours, why don't you leave and say hello to the wife for me?" Rin shot back with a cold smile none of them knew he was capable of giving. It matched the one his twin sometimes gave and suddenly, the two demons could could see the resemblance.

Yukio didn't know how to deal with Rin when he was like this(this was new, Rin never bold like this–he usually bent to his twin's will), so he just pressed the issue.

"This is not a game, Rin! You don't have time to be taking bubble baths and messing around with Demon Kings! They're going to kill you if you don't pass the exam the first time!" Yukio was quickly losing the little patience he had.

"Fine then! If you think I'm so irresponsible, I guess I'll just mess around and do what I want and then die! It'll make your life a hell of a lot easier when I'm dust!" Rin snarled back, baring his fangs. Amaimon's tail tightened and coiled around the boy's fingers.

Yukio looked somewhat desperately at the Headmaster peacefully washing conditioner out of the his beother's hair and pretending to not care about the argument in front of him. "You made this bargain to save him! Aren't you angry over his irresponsibility?!"

Mephisto finally looked up with his signature grin and laughed. "Oh Yukio, I made this deal to save my own neck. And I merely wanted to see what he would become. If he so chooses to end his lineage here, than that is his choice. I can't give extra braincells, you know. I'm not God." He chuckled. Rin snorted at the seemingly careless words.

"And I'm not your responsibility. Get out and stay out if all you're gonna do is bitch and whine about someone who never asked for your help." Rin added. Mephisto almost choked. That was savage, especially for the ever caring and patient Rin! Seems he's had it with that bratty little brother of his....

Mephisto could understand the sentiment. The amount of rewinds he'd had to deal with because of the troublesome human twin was astounding!

Amaimon seemed to be loving the drama, if his tail practically writhing against Rin's hand under the water now was any indication.

Yukio clenched his jaw and looked like he wanted to argue further, but instead turned and left with an indignant huff.

"How dramatic." Mephisto sniffed. He ran his hands through the now silky hair. Rin shivered.

"He's been like that lately." He muttered, annoyed.

"Oh no, Dear, he's always been like that. You've just finally seen it through your desperation for something to call Home and for someone to love you." Mephisto hummed knowingly.

Rin smiled dryly. "Wow. Thanks for that."

"You're quite welcome."

Amaimon went from kissing Rin's shoulders to his neck. When Rin didn't pay attention to him, he bit down hard.

"Ah~! Amaimon?!" Rin looked down at him, confused.

"Oh, dear. He wants attention, Rin. Your attention." Mephisto huffed out a laugh behind his hand. "Although it sounded like you didn't mind his method of getting it."

Rin blushed scarlet and Amaimon purred, trailing kisses and nibbles up the half-demon's neck to his jaw. The Earth King tugged at his earlobe with a fang.

"Jeez, are you trying to give me a free piercing? What's with you?" Rin said exasperatedly.

"He gets like this sometimes, especially when he's found something new to fixate on. Rather distracting when one is trying to get through paperwork that seems to never end." Mephisto laughed, smiling fondly at the demon. It was almost a strange look for the man–just genuine emotions and not teasing, threatening, or sassy.

"You should get piercings." Said fixated demon told Rin, kissing first the corner of his mouth, then his lips. Rin hummed and kissed back.

"He likes to pull on them. Don't get them unless you can take the pain." The Time Lord warned.

"I actually used to have some. I was unsealed on a day I wasn't wearing them– I was on my way to a job interview that day–so they closed when I unsheathed the sword." Rin informed them when he escaped the biting kiss.

"Oh?" Mephisto was suddenly more interested in the teen.

"Mhm. He has two in his dick." Amaimon agreed hotly, turning Rin's face to kiss him again with a grin that one could only call excited.

"I'm starting to see why Amaimon's suddenly obsessed with you." The King of Time admitted after the confession. Rin's shoulders shook as he laughed into his kiss with Amaimon. His tail came up with a wet plap! to Mephisto's cheek to gets him back for the mocking comment. The Time Lord made an offended noise.

"He has a Lorum and a Reverse Prince Albert." Amaimon disclosed.

"I'm not going to ask how you know what the piercings are called individually, but I will investigate them." Mephisto declared.

He took a deep breath and plunged under water. He opened his eyes and blinked a couple times before being able to see clearly. Rin did, in fact, have two silver piercings in his dick–one at the base of his dick just above his balls and one imbedded in the head.

The Demon King suddenly felt a heat he hadn't felt in a long time rush through him and surfaced. He grabbed Rin, picked him up by the hips, sat him on the edge of the bath, and downed him in one go. Rin cried out and hunched over, fingers tangled in the wet strands of Mephisto's hair. Amaimon pouted off to the side before coming up behind Mephisto and kissing and biting his shoulders and neck like he'd been doing to Rin.

"Ngh~! Mephisto~!" Rin moaned in surprise, bucking his hips up, choking the Demon King. Said Demon King moaned, the vibrations making Rin shudder. He felt the piercing at the base of his dick get tugged on and gave a loud moan. He absently hoped Yukio wasn't close enough to hear them.

Demon tongues were insane and Rin could feel Mephisto wrap his long tongue around his dick and just barely scrape a fang across the head. Rin's hand tightened in the purple hair as he bucked his hips up into the talented mouth and Mephisto let him.

The Time Lord reached around and ran his claws along the base of Rin's tail. The half-demon gave a high-pitched cry and fell backwards as his bones turned to jelly, the cool tile contrasting with the heat emanating through his body.

Mephisto moaned around the dick in his mouth, sending vibrations up the shaft and eliciting another cry from the half-demon. He felt Rin's dick pulse in his mouth as the boy released waves of steadily rising heat.

"Nng~Mephi....G-Gonna cum soon~!" He panted.

Mephisto pulled off briefly. "Call me Samael, Darling~" He purred before going back down on the half- demon.

Amaimon got up and crawled to sit beside Rin. He initiated a very messy kiss and Rin mewled as the Earth King's hands gently pet his tail before tugging and moving to bite down hard around Rin's artery. At the same time, Mephisto swallowed and hooked a fang in a piercing, tugging on it. Rin gave a jolt and came loudly, arching his back, his cry echoing off the tile walls.

"Samael~!"

He was panting when Mephisto pulled off. He whined, tail wrapping around Amaimon's neck to tug him away and the Demon King finally unlatched his fangs from the pulse point. Rin shuddered again, catching his breath.

"So....piercings are a turn-on for you too, huh?" Rin gave a sideways grin to Mephisto, sitting up. The demon's cheeks tinted a light pink, just barely noticeable.

"I do find them quite attractive, yes." He answered, keeping his composure. Rin wondered if he'd ever be able to make the demon break that perfect composure. Now that was a challenge he looked forward to.

Rin leaned down and initiated a deep kiss with the Time Lord. Mephisto hummed and let the teen kiss him breathless before they broke apart.

"Maybe we should teach you about our culture. You'd probably fit in much better in it." He breathed.

"You think so?" Rin smiled.

"Yes. Demons are not all the same. They do not all have the same anatomy like humans do, nor the same brains or levels of understanding that humans do as they grow older. They have all sorts of abilities and needs. Gehenna is very accommodating for people." Amaimon explained.

"Let us teach you, Darling?" Mephisto gave him a rare genuine smile and Rin softened. What could he say, he was a sucker for attention, physical contact, and pet names.

"Okay."

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Edit 3/3/22: I haven't written smut in so long, I forgot how embarrassingly good I am at it....

And I'm so a sucker for Mephisto's pet names, and his character in general, bc I love writing him.