Bruised lips against salt water flesh, licking and biting. Rivaille's hot breath fanned over gentle skin and a light moan escaped the boy's lips. His long and untrimmed nails dug into a clothed back, making the man hiss out. But the pain was welcomed; anything was desired. It was a proof of existence. It was a feeling.

For an entire year Rivaille felt empty. Nothing in his life was exciting nor did it bring out any emotion from him. But that encounter with a forbidden creature was thrilling. His heart raced when they first made contact, and he was addicted to the taste of his salt-soaked skin. Everything was intoxicating. This was not something he desired, but something he needed.

"So, how does it feel to have legs?" Rivaille asked, kissing his way down a bare torso. Honestly it was a ridiculous question during the middle of the boy being worshiped by a hot mouth, and Eren could barely respond.

"Nn…d-different." He breathed out, looking down curiously at the shorter male who had made its way to the dangling organ between his—OH. "A-ahn! Ah…nng…w-what…ahn…hah…"

The lifeguard couldn't help but let out a small smirk as his hand wrapped around the member and pumped it slowly but surely. "How's that feel?" The mermaid's face heated up, this new pleasurable feeling foreign to him.

"W-what…is…" He couldn't finish his sentence as more throaty and whiny moans escaped his throat.

"It's a human organ for pleasure. Don't you, er, have one in mermaid form?" Rivaille asked, a bit puzzled about the anatomy of a mermaid. The boy shook his head.

"M-much…s-smaller…" He choked out as Rivaille continued to pump his growing erection. "Not…s-so…gOOD! AH!" Eren let out a cry as his dick was covered in something wet and hot. He dared to look down and saw the man had started to suck on it. He tried desperately to push him away. A little annoyed, Rivaille pulled away so he could speak.

"What?"

"…"

"Speak up!"

"…isn't it…gross?" There was a few moments of silence before Rivaille stood up, picked up the flustered mermaid-turned-human, and laid him down on the bed.

"If it was gross, I wouldn't do it." He spread Eren's legs wide and situated himself between them, his face near his throbbing member and quivering hole. He stared at the mermaid, waiting for a silent nod before he delve in once more. He continued to pump him with one hand and slipped his tongue inside the pink ring of muscle.

His high-pitched moans filled the room as Rivaille worked him, adding a couple fingers inside the tight hole and pleasuring his length. Eren had already came once due to plain inexperience, but he was going to do that a lot more until the lifeguard was satisfied.

Once Rivaille deemed him ready, he leaned up so that their faces were right next to each other. Again, he was lost in that deep emerald, entranced by the creature beneath him. Eren himself was also entranced, immersing himself in the beauty of a human male. It was his first time seeing a human, and he was completely in shock. His heart quivered each second they stared into each other's eyes, their silent gazes telling them all they needed to know.

Their lips connected lightly, not overpowering each other. They just moved against each other, needing to taste one another. And when Rivaille pushed himself deep into Eren, their moans were in harmony. They had become one in the most intimate of ways, and they would be willing to delve further.

"Nng…Rivai!" Eren moaned loudly, but it was quickly sealed off by a hot mouth, reassuring him that everything was going to be alright. He pounded faster, making sure to hit that sweet spot every time. He wanted to give the boy every bit of pleasure he could. Rivaille wanted to give everything to this boy he had barely met for a few seconds, and it scared him a little.

He had never had such feelings like this before. But it was worth it. This was someone who made his heart beat with excitement. He didn't care what it was called, only that it was real. It was happening, to him of all people. His cold exterior was melting all bu the work of a mermaid. Eren was naive and young, but that didn't matter. Finally he had someone that stirred him, whether it was good or bad.

Pleasure was painted across their faces, and ecstasy was just on the horizon. This was their own paradise, be it in the water or on land. It didn't matter. Mermaid and human; man and man. Who gives a fuck? This kid makes me feel. That's all I've ever wanted…was to feel.

A single tear rolled down his cheek as he cried out the boy's name, spilling his seed into the boy, his own name being moaned out just seconds later. Sticky and hot, Rivaille managed to carry them both to his tub, filling it with water.

"Rivai…Rivai…" The mermaid mumbled his name over and over again, his bright green eyes, staring at his lover. "That f-feeling…" Rivaille nodded silently, lowering them both into the water so that the boy was sitting in his lap.

"Yeah, I know. You don't need to say anything else, okay?" The boy nodded, obeying him as if it was an order. "Just let me hold you."

The human clung onto the only thing that brought color into his life. Everything had faded from black and white to a bright and vivid color. It was as if he was finally born, and that he was seeing the world for the first time cramped with a mermaid in a ceramic tub.

Eren's feet soon melded into a fin once he was submerged, and it flopped excitedly. Water splashed everywhere, all over the floor and onto Rivaille. He giggled and voiced an apology, his cheeks heating from embarrassment.

And for once, Rivaille didn't give a shit about the mess in the room.

You guys! This was supposed to be a oneshot! And thanks to all my reviewers, it got three chapters! Ha, I really hope I didn't disappoint. This is the last chapter and there is nothing else after this; I will be stubborn on that. Everyone seems to like Attack on Titan fics...is there any other fandom you'd like to see me do? Let me know in the reviews! Thank you all for reading this!

~Ichi