Okie guys we have made it! Sorry about the weird pic edit I made too... I might fix it if y'all dont like it, but I'm lazy ;P Like I said Lemon time! If that wasnt one of the reasons you wanted to read in this story, well... getthefuckouttahereitwasgunnahappenandyoucantstopme!!!!
Enjoy~ ;3

Everyone was getting partied out, and decided to head to their tents and go to bed, but not you and Senku.
Senku wanted to stay and toy around with his new telescope, so you stayed with him as he tinkered away. You knew the villagers gift was practical to Senku, but also sentimental too, even though he didn't want to say it. He was estatic, and it was really cute! Luckily you decided to make a bed in the observatory, for Senku's late nights... *Wink wink*
You finished making the bed and went over to your husband happily working on his new gift. Luckily he was kneeling on the ground, so you nuzzled your head in the crook of his neck, then you blew on his ear. Your action gave you a blushing Senku reaction! "What are you doing Bun?" he asked his ruby reds now piercing at you from the side. Something else flickered in them as you looked, but it was only for a second... musta been a reflection or something...
"Well... I didn't have much to do with this gift... so I concocted another gift for you, Senku~ I think we both will enjoy your second surprise~" you whispered and bit his earlobe.
It was super effective!
You earned wiggle out of the ombré haired male! This made you smirk as the first part of your plan was going into motion. Time to bump up the simulous some more!
You begun to kiss down his neck and over his shoulder. He let a moan escape which made you more excited, this was going to be exhilarating~
"Does your gift involve distracting me? Because it's working, but you know... it is MY birthday..." Senku quickly spun an stood up, he grabbed you up and sat you on the window seal. "So, I get to do whatever I want right?" His voice was husky, his face was inches away from yours with his lady killer smirk of his! Holy shit he was fucking hot! You never knew he had this in him, true primal instincts! Only he would allow you to see though. You nodded quickly as you blushed so hard! Senku kissed you passionately, gabbed your right breast and started messaging it. Now, he was the one earning small moans and wiggles from you.
"mmm... ahhh S-Senku~"
Senku begun to grind his covered manhood on your clothed womanhood, and it was frustrating, you and him needed more! You needed to show him his gift, but maybe more teasing first.
You stopped him and untied his clothes off his lean body. He undid yours too, leaving both of you in your underwear. He picked you back up and set you down on the bed that was in the corner of the room.
His eyes did change colors! Instead of the ruby red they normally were, they were a bright lusty fuchsia color now! He NEEDED you, right that instant, but he would still be gentle... at first.
Senku climbed on top of you and pinned your hands over your head, you blushed madly still at all his actions he made.
"Hehe, well it's been a while since we've done this... I knew you'd be wet, but you are soaked! Look~" He rubbed on your womanhood, you squirmed under his grip and moaned out. He removed his hand showing your juices all over his fingers. You smirked looking down to his bulge. "So says the pot calling the kettle black."
"Oh clever girl~ You do have a smart mouth on you, and I'd love to hear you sing out for me~"
Senku took off the rest of your clothes and stuck one of his middle finger in your wet cavern.
"A-ahhh~" you arched your back at this sensation he caused. He begun to pump in and out slowly so you could adjust. As soon as you got used to one finger, he added another finger and that made you wiggle and moan so much more! He was so close to make you cum, but he pulled out after the last second. You pouted at him, he released you from his grip and licked his fingers.
"Mmm you taste so good Bun~"
"You jerk I was almost-" he cut you off with a rough kiss.
"Sooo, what kinda gift did you make me, I'm supposing it has something to do with this, right?" He asked curiously.
"Oh, yeah!" You searched for your dress pocket and pulled out a latex condom!
"I made a condom for us!" You beamed as you handed Senku the little laxex object.
He looked at you in utter disbelief, you actually made a condom!??! In the fucking Stone World!
He took the condom from you an analyzed it for a while.
"How in the hell did you manage to make this?!" He exclaimed with big eyes.
"Well, I remembered how to make latex out of: Coconut oil, cornstarch, water, and gelatin... and those were the hardest parts to make, but after those are mixed together and strained several times it's pretty simple, just very time consuming...kinda akward too! I had to get Kaseki to make me a- uh slender glass part as well... hehe." you answered shyly. You could tell he wanted to ask you multiple questions, but he snapped out of his logical state and back to his animalistic beasty behavior. His eyes went back to the fuchsia color and he smirked at you again. He took off his boxers and his length sprung free! You had forgotten how, BIG Senku was...
He put the condom on without complication and made you flip around on your hands and knees!
"Scream my name for me, Y/N!" After he demanded that, he plunged into you! You let out a yip in pain, but he let you adjust. You looked over too him with your tongue out and wiggled your hips.
"Sen...ku~"
He grabbed your hips and begun to pump in and out, gaining speed with each thrust!
The room filled with yours and Senku's moans! You tried not to make too much noise, then Senku stopped abruptly.
You pouted again. Before you could look back, Senku had started kissing and nibbling on the back of your neck! He even took one of his hands and started messaging your breast!
"Mmm Ahhh~ W-what are y-you doing... Senku~" Your mind was going fuzzy and you spread your legs as much as they could go!
"You feel s-so...g-good! But I said scream for me didn't I?" He cooed as he continued his actions.
"MmmY-yes, but..."
Senku thrusted his hips into you hard and deep!
"SENKU FUCK ME TEN BILLION TIMES FASTER! PLEASE!!!~"
"That's more like it!"
He did as you said, this time he was hitting all the right spots! You were moaning, screaming, panting, and arching your back so much!
Who knew he'd be such an animal in bed!!!???
"SENKU IM GUNNA-"
"AHHH ME TOO Y/N!"
Both of you climaxed at the same time and you both collapsed breathing heavily. Even though Senku was propping most of his weight off of you, he finally collapsed beside you.
"That *pant* was *pant* exhilarating!" Senku squeezed your body in a loving hug, and gave you kisses all over. He was right, you were so glad you figured out how to make his gift~
"You should definitely make A Lot more! I can help you too, we can make them thinner! Mass produce them even... " He chuckled
"Haha You are every bit of the word Mad Scientist! Happy Birthday Senku~ I love you to the moon and back!" you smiled and gave him kisses back.
He threw away the condom and put the covers over both of you.
"And I love you to the Milky way and back."

This was definitely one birthday Senku would never forget!

Holy shit! Yassss I hope you guys enjoyed this Lemon!!! #hopefullyimademylemonersproud ;3 also what do you get if you add 30 to all the chapters I have now?