Summary : Rin can't fight anymore his demon's needs for sex, but Amaimon's here to take care of his little brother. Yaoi.

* I don't own the characters.

** I don't speak English, so tell me if sentences don't make any sense, or if there are mistakes, and, of course, if it's shitty.

*** This is my first fanfic ever. I don't pluck up yet the courage to carry on, so please tell me to continue, or to stop!

First part : Dirty

"I'm here for you, otouto" he said, holding him tight. "Hush… Don't worry…" Amaimon was holding him against his chest, stroking his face, reassuring him, repeating him everything's gonna be okay. Rin grab his jacket, shaking in his warmth. "I'm taking care of you… It's okay". He leaned his head on the other's. "Just relax, otouto".

He put his right arm on Rin's stomach, and began to stroke it in a circular motion, gently but firmly. The boy startled at first, but then started to relax under his touch. Of course, he needed it, needed him. "Amaimon, I… -"

"Shh.. Don't you enjoy it, little brother?" he said, still massaging his stomach, pressing it gently with his two arms this time.

"Hh..Hai.. Hai".

So cute. His little brother was so desperate. He tried so long and so hard to ignore his demon's urges, but he couldn't keep anymore. He just couldn't relieve his body on his own properly. Nor could he speak of his problem with someone. He was so frustrated that it's become physically painful.

Amaimon moved, laid carefully Rin on the bed, and sat over him, facing his troubled, needing brother. "My baby brother just doesn't know what to do, but I'm here for you." He put his hand on the other's sides, brushing them slowly, producing a sweet warmth in Rin's body. He smiled when he felt the boy's hands on his wrists, asking him silently to keep massaging him. "Yeah, I know how you feel.. I'm taking care of you, otouto". He touched his lower abdomen softly. Rin's moaned. He needed attention so much, especially a demon's one. The King of the Earth smiled again. "My baby brother… "

He leaned toward the blushing face, captured his lips greedily, and started to suck at them while he ran his hands under his shaking shoulders, trying to soothe the lovely boy. When he nibbled at Rin's bottom lip, this one open his mouth without waiting, letting Amaimon invade his mouth eagerly. The elder's saliva was flowing in his mouth, making dirty sounds that were just exciting Rin more and more. This whole kiss was so obscene, and Amaimon made it go on as long as possible, until his younger brother started to choke with his tongue and their melting saliva. He broke off the kiss, and let more saliva drip into his brother mouth. This later moaned weakly, and then crashed his lip against his again, forcefully, asking for more, and more – how could he resist to this? Amaimon gave him a deep mouthful kiss, and let again his saliva flow in the other's mouth. It was just like a ritual exchange, a kind of gift to his little brother.

He broke off and cupped Rin's face. "That's good, my baby brother... You're so horny. Hush… Hush…". He offered his mouth again to the greedy boy, who enters his tongue himself this time, explored his mouth, and tried to go as far as possible. The demon struggled, and broke, cupping the boy's face again. He was far more excited than he tough he would. Mephisto was right, their otouto was cute, since he didn't know how to face to his demon's needs.

Amaimon lifted himself slightly on his hands, his knees on each side of Rin's hip, and rub in the process his erection on the other's one. The younger moaned loudly, and started to lift his hips to get some friction again.

"Hmm…" the older enjoyed it a moment and then hold Rin's pelvis strongly against the bed.

"Ha…" moaned this one, frustrated. "Please… "

Amaimon smiled. It was so good to see his baby brother so wild.

"Are you okay, ni-san?" This one was trying furiously to move his hips.

"nn… no !"

"Why…? Is it painful?" he said, caressing briefly the large bulge in Rin's pant.

"Y-yes!... It's so hard.. Ni-san, help me... please..."

"Yes, that's hard, my baby brother..." He smirked, enjoying the show. It was beautiful. He knew how Rin's was suffering right now. Being a demon in a human body shouldn't be easy.

He leaned toward his face, and kissed again those hungry lips, and his jaws, kissed then his temple, his ear, nipped at it, and began to slowly suck at his earlobe. Painfully slow. "Hnn…." Rin groaned with pleasure and frustration. He finally managed in moving his hips and finding again this delicious friction. His tail instinctively wound around Amaimon's lower abdomen, pulling him close, grinding their erection together, causing them to gasp.

"Amaimon!..."

"I'm here..." he replied, stroking Rin's sides.

He then pushed firmly his hips on the bed with one hand, and opened his trousers with the other.

"Hnn…."

He smirked and began to touch the half-demon cock through his underpants, which was pretty wet already.

Rin jerked and groaned loudly again when he felt long warm hands stroking slowly his begging member from the base to the top, from the top to the base, pressing lightly on it.

"Hnn… " He griped feverishly the hand that hold his hips, panting, looked into the amused eyes of his brother, silently begging him to touch him more, faster, to remove his clothes, to fuck him senseless, … Amaimon chuckled while he pushed stronger against the other's pelvis, now with the two hands. "Sh..." He let his own tail get out of his shirt. It came straight to Rin's erection and started instinctively to move to and fro on his pants. He then ran a hand under the elastic, and let his tail slip by itself in the wet, tight, warm place.

"Ha .. !" Rin cried. The sensation of the soft fluffy tail wagging in his pants was just too exciting. The fur teasing the tip of his cock, wet with the pre-cum, was driving him mad. When he felt the tail wind tightly around his shaft, tightening and loosening alternately, going up and down, he dug his nails into Amaimon's wrists.

"I.. ! Ha…. I'll…!"

The elder removed his arms and came to sit on the boy's belly, his tail continuing to pump. Rin grab again strongly his arms. He leaned toward his face, petted his dark hair, and whispered in his ear "It's alright, my baby brother… come."

Dirty. That was just too dirty.

He came hard, shouting of pain and pleasure, cramped in his wet pants, in his tight trousers, as the demon was petting his hair and licking his cheeks in an animal way. His pants soaked in precum and cum.

His body relaxed after tension. He felt dizzy. Amaimon, above him, looked in his eyes with an unreadable expression, and gave him a deep and arousing kiss, while his tail went off Rin's pants, making the latter moaned, and then sat up.

Rin felt his face flushing. All of this was so dirty… yet he wasn't really embarrassed. In fact, he was still aroused, as each time he jerked himself off since he became a demon. And more than that, he was excited by the sensation of the wet pants, by this whole scene. He looked up to see Amaimon.

This one was casually sitting on his belly and looking to his little demon-brother, with his usual bored expression, holding his tail in one hand and sucking at the tip of it as if it was a lollipop. Rin gazed at his face. No. Actually, it wasn't his usual bored expression. His eyes were full of lust.

"Did you enjoyed to play with me, otouto ?"

"H…hai.. But… I…"

"Shh… " Amaimon said, stroking Rin's cheek with his free hand. "It was fun, ne? You wanted more, that's it?"

"…. …. hai…"

He let his tail go, and grab Rin's collar.

"My baby brother is so shy... You still can't understand your desires. You need to fuck as you never fucked, darling."

He stood up, and pulled Rin out of the bed by his collar. He then pinned him rudely against the wall. Now, there was a salacious smile on his face revealing his sharp canines.

END of the first round

Thank you so much for your reviews ! really. I'll corrrect my mistakes, and try to go on with this !
And Kyuubiluver, you're right, Amaimon should be more sadistic.
Yeah, it's sick.. hope you like it !