So... yeah not a Lemon yet......but with Senku being as smart as he is I'm sure he can make a condom *wink wink* if you don't like Smuts you don't have to read this, i don't know if i even did a good job on it. but i have read many... so hopefully i did some justice to my fellow Smutters!

Enjoy!!!! ;3

Senku hovered over you, thinking what would be the best plan of attack to your beautiful, soft breasts. You watched intently as he lowered his mouth onto your nipples and began sucking, it felt tingly in a good way. You grabbed his other hand, so he could rub on your other breast. His experiment was going well, he earned little moans and you ran your fingers through is wet hair, he looked even more handsome with his hair soaked an down. His scarlet eyes would look at your face to see if he was doing nothing wrong from time-to-time, it was his first time, and he was a little nervous, he didn't want to hurt you.

Senku began to kiss over to the other breast and do the same treatment as the other. After that he began to kiss down over your sides to your hips, which earned him uncontrollable wiggling and giggling from you.

You sat up and started to speak quietly," Hey Senku..." he looked up a little worried.

"I didn't hurt you did I?" he asked, he looked so cute.

"You could never hurt me Senku, but since this world doesn't have condoms... and I don't want to get pregnant... I still want to pleasure you too... so lets try 69."

He looked at you surprised, but nodded in agreement. He REALLY wanted you, but if you weren't ready he would still ten billion percent enjoy 69! Senku read about different sex positions and a book about human orgasms, so that was a perfect way to begin.

Senku laid down and tried not to move as you positioned yourself, it was so big could it fit in your mouth? You hoped it would feel good, you started to worry, but your train of thought broke when Senku grabbed your ass and went to town on your wet womanhood.

"Ahhh~" you moaned. It felt so good, you moaned and your head went dizzy. You got the courage then to begin pleasuring your boyfriend too.

You licked his tip, and you earned a hip buck and little noise from Senku. You licked it all over starting from top to bottom. You than took his whole length into your mouth, you moaned onto him as you felt Senku becoming more rough with your honeypot, he was licking like crazy, and you began to go crazy on him too. These sensations felt amazing, you couldn't believe this was Senku's first time doing this. You were glad you could be his first.

Sweaty and moaning messes you both became sloppy with pleasure. You were so close, and so was Senku, you both went as fast as you could, then released at the same time.

It was heavenly, you thought sex would probably be ten billion times more amazing, but until Senku figured out how to make a condom, this was second best.

Some of his cum landed on your face and your juices all over his mouth. Both you and Senku panted. "That was ten billion percent amazing Y/N! I love you." Senku finally said breaking the silence.

You giggled as you turned around,"I love you too, but weren't we supposed to get cleaner, not dirtier?"

He laughed with you and then took your hand leading you to the water and washed you off, you did the same to him. He kissed you so much, that you wanted to do the dirty again, but both of you were pretty exhausted and decided against it... for now.

The fireflies danced around the waterfall, it was enchanting.

Suddenly, a greenish, bluish, purple glow came from the Waterfall all around. It was so magnificent you never seen anything like it!

"Woe Senku, this is amazing!"

"It is amazing! it's a form of bioluminescent algae, look some of the fish in this pool are also glowing too." Senku pointed out," there must be a underground cave coming from the ocean letting these animals get in here, there are Jellyfish, Sea Stars," he named all the animals in the pool.

You just listened and stared at Senku, he was so excited with this scientific phenomenon. You didn't mind he was so cute, his eyes sparkled and you couldn't help but watch him.

He was perfect, he may be a little distant at times, but you knew he loved you with everything he had. And you loved him back equally as much... maybe a little more now that you both got so much closer on this magical night under the stars.