I don't own

Rivaille lay on his back, breathing heavily. Eren was on top of him, peppering kisses all over his chest, and slowly moving towards his crotch. He shivered as Eren reached his member, slightly sucking on the head, as the older man arched his back with pleasure. Pleased with the reaction, Eren engulfed the older man's shaft in his mouth and began sucking. Rivaille moaned, entangling his hand in his hair as he began to bob his head up and down. Eren felt Rivaille tense up in his mouth and began to massage his balls.

"Eren!" Rivaille moaned as he came into his mouth. Eren swallowed every drop of his cum, and then went back up for a kiss. Rivaille could still taste himself on Eren's tongue as his tongue entered the German's mouth. They both battled for dominance, and Eren won, surprisingly skilled with his tongue. They eventually broke for air, saliva trailing between them. Rivaille pushed Eren down on the bed.

"Heich-mmmm…" Eren was cut off by a nip on his neck. Goosebumps formed, and he moaned. Rivaille continued to nip at Eren's neck, earning more moans from the boy. He wanted to mark Eren as his, so he bit down on the base of his neck. Eren arched his back, moaning loudly. RIvaille began to unbutton Eren's pants and slipped off both his boxers and his pants simultaneously. Eren's member was throbbing and erect, and Rivaille stared at it lustily. Eren sat up and shoved a finger into Rivaille. He winced at the sudden pain, but quickly relaxed, and moaned as Eren slipped in another finger and began to pump slowly. Hearing Rivaille's moans, he smirked.

"You want me, don't you?" Eren asked huskily. Taking his moans as a yes, Eren began thrusting his fingers in and out faster. "Well, you're going to have to beg for it!"

"Fuck me, Eren!" he exclaimed.

Eren licked the back of Rivailles ear, causing him to shudder. "That's not good enough~!"

"P-please fuck me!" he exclaimed, a blush covering his cheeks.

"That's more like it!" Eren growled in his ear, making him visibly shudder. Eren took out his fingers, and applied lube to his throbbing member. He slipped into Rivaille and groaned. "Hng… you're so tight!"

Eren began thrusting into him, moaning loudly. Rivaille moaned Eren's name loudly, gripping his shoulders. Eren gained speed, and they both moaned in unison. Eren yelled, "I'm going to-!" but was cut off by the sensation of him ejaculating.

Eren spooned Rivaille, and whispered into his ear, "You're so cute~!" as they fell asleep.

Unknown to them the whole squad could hear them, Hanji was dying from a nose bleed, and Mikasa was fuming. :P

I have a bit of writers block concerning HSS, so that may take a while.