This is based off the deffinition of 'rainbow kiss' on Urban Dictionary...
Your POV

One thing i hate about being a woman. Is the period bullshit. Yeah its for letting me have kids. But damn really once a month? That's annoying. Especially when i can't do anything about it.

I mean anything turns me on. Even coffee. Then Stein knows and he likes to walk around shirtless. Damn tease!

I groan on the couch and hear his chair squeak as he turns around. "Oh can't handle your hormones?" He asks. I flipped him off. He chuckles and stands and walks over. Leans on the back of the couch and kisses me. I hold his lab coat and he grabs and squeezes my breasts and i moan letting him go.

He smirks and walks off. "Stay out of my lab...if you know what's good for you." he says chuckling. "Damn you Stein!" I growl. He chuckles in reply and i hear the heavy door close. Getting up i bite my lip and walk to the lab. I open the door and see him putting a sheet on the table.

I raise a brow. "What're you doing?" I ask. He smirks at me. "Getting my table ready." He says. I raise a brow "What for?" I ask. "You of course." He says as he snatches me from the floor and puts me on the table. I blush as he lowers his gaze as he sits down.

I smile and moan as he runs his thumb lightly around my shorts. I blush deeply as he kisses the shorts and lets his tongue run around on them. I moan lightly. He smirks and pulls away using his scalpel and cutting them away. My underwear went with them.

I smile as he pulls the torn fabric away. He kisses my clit and i feel the string of my tampon lifting away from my skin slowly and the blood blockade being pulled from my entrance.

I blush as i hear the blood hitting the floor and his two fingers being inserted. They trusted slowly as blood covered them. He moved roughly and licked my clit quickly. I moaned loudly.

He smirked and moved fastet before i came over his hand. He stood and had a chin covered in blood along with a hand. He walked over to his sink as i painted and washed up before walking back over.

He kicked his chair away as he unzipped his pants. "Your noises are intoxicating~" he says. I hear his pants hit the floor as he touches me with his tip and his hands spread my legs apart. He pushes in deeply and i moan loudly.

He thrusts slowly and i pant. "Do me a favor~" i moan. He smirks and flicks his hips at me. "Anything baby~" he moans. "Cum inside as many times as you want~~" i gasp as he roughens his pace. He leans down grabbing my hips. "Gladly." He says.

He pulls out and slams back in. Pulls out and slams back in. I flinch each time. He smirks and goes back to thrusting as i moan and his breathing hitches. I smirk and grab his hands. He pulls himself down and kisses me. "I should've don't this sooner~" he breathes. I smile blush and nod. He chuckles and pulls me closer before he gets sloppy. He cums inside me with a loud moan and i pant. He chuckles before flipping me over and going in making me bounce against him. He has no avail. He picks me up and takes me from behind and i shake and scream as i finish with him.

"Took you long enough~" he chuckles. He pulls away letting me sit down. "Took me long enough. Took you long enough." I say. He kisses me and smiles. "Help me clean this up." He smirks.

I shake my head. "You started it." I say. He looks at me and i smile. "I love you~" he says. I smirk and blush. "I love you more~" I say. He smiles and kisses me. I feel someone poke me and i look at him. "Someone's horny~" i say. He blushes. "Shut up~" he says and kisses me. He pushes back in and i smile. "Round four huh?" I ask and he moves slowly. "I just wanna really feel you this time~" he says as he moves slowly and kisses me. I kiss back and smile. He pushes deeply and i wrap my legs around his waist. Moaning into the kiss we smile. "You feel amazing~" we say. I chuckle and blush and he smiles as he pulls me closer.

He picks me up and moves to his chair. He lets me ride him and i smile as he holds my hips. I smile and kiss him again as i get closer. He pants heavily as i smile. "You're close again~" i smirk. "Your body will be the death of me~~" he says and sucks on my neck. I moan loudly and he groans as he cums inside of me and i shake on his lap.