A/N: Hello my lovely readers, this is my very first yaoi one shot! If it isn't obvious yet it's between Rin and Amaimon, enjoy~! And it's in Rin's point of view!

~ 2 months ago ~

Damn Amaimon to hell! I'll kill him, no matter what it takes!

The black hair demon outstretched his nails, his flames engulfed his body as he stared at Amaimon immensely, his true demonic form was showing and Yukio plus the others could only watch in fear. He fling his sword off to the side and charged at the greenette demon, trying to claw him.

He fucking dodge.

Rin growled and tried again, but only seem to fail each time. "STOP SCREWING AROUNG!" He yelled, his flames spurted out in complete range.

"RIN!" Shiemi shouted, the demon's ears twitched and turned around angrily. His eyes slightly widen as he saw tears? He looked at the others, they all had worried expressions.

Amaimon blinks and looks over at them, his stoic expression not changing. He did manage to get a few bruises and cuts from Rin, tilting his head as Yukio walked over with his sword and case.

Rin had his back facing Amaimon, putting his sword away. His facial went back to normal, his piercing blue eyes stared at him, not knowing those three words would change them both entirely.

"I hate you." Rin spoke in disgust, "Don't you ever near me again." And with that, him and his friends walked off.

~ Present ~

"Onii-san.. What am I suppose to do when the demon I want to play with won't chase me." Amaimon said as he found one of Mephisto's girly manga, he had his familiar underneath his chest, reading out loud.

"Amaimon..." Mephisto said in a warning tone, he twitched when the demon ignored him. "Amaimon!"

Amaimon looked up, blinking in confusion. "What is it?"

He simply snatched the manga from his hand and nearly screamed, "This is the new one I bought! And it has your fingerprints on it now! I don't want any relative of mine behaving this way, go do something." He growled under his breath.

The other sighs and picked up his familiar, holding it close to his chest as he walked out the house. He remember clearly from the book he was reading the girl was supposing to be in 'love' but Amaimon can see right through it.

I think humans confuse their fast heartbeat with love, when it's really from fear.

He jumped on a tree branch and sat down, still thinking as the bell suddenly rings in his ears. He glances down and his eyes went wide for a moment.

"Bye Okumura!"

Rin gave his friends an closed eyes smiled and waved, he didn't see Amaimon up in the tree as he slowly walks underneath it.

The greenette purposely hanged upside down and stared at Rin, the poor boy let out a scream and fell on the ground, his heart beat speeding up.

"Is your heart pounding?"

"Of course it is you idiot!"

Amaimon jumps down, walking towards the Raven head, placing the palm of his hand on his chest, and indeed it is beating fast.

"From now on, I want your heart to speed up every time you see me."

What is wrong with this guy..

Since the greenette was distracted with his own words, Rin took the opportunity to make a dash. Once again his heart was pounding and he glanced back with a slight frown on his face, slowing down his speed.

He's not chasing me..?

Rin made it to his dorm and Yukio wasn't there which didn't surprise him, he went straight to his bed and flops on his back, closing his eyes. He felt a strange aura in the room and his ears twitched, he decided to open his eyes and he saw Amaimon hanging on the ceiling. "Are you fucking serious.."

"Yes, I have to startle you so your heart can go pitter-pat."

"I don't understand where your getting at!"

"I don't think your suppose to tell the test subject what to expect in the experiment." The greenette covered his mouth he already said too much.

Rin hang his head low and gritted his teeth angrily, "I'm just some experiment to you... Is that it?" He sounded hurt and he grips the bed sheets, "GET THE HELL OUT."

Amaimon was somewhat taken back and jumps down from his position, leaving the dorm like he said. Despite Rin telling Amaimon to leave, he wish he never yelled at him. He had mix emotions and tries to get rid of them on his own, he went to the kitchen and sat down in front of a large window as he attempts to do his homework. He glanced around, "He really left..." He murmurs and looks back down.

He heard a tap on the window, when he looked up.. It was him, He placed his hand on the window. "What?"

"Can I come in? I will explain the experiment to you."

"A locked window never stopped you before.." He murmurs and unlocks the window, the greenette swiftly slides in and immediately placed his hand on Rin's chest.

"Your heart.. It's not beating when you see me?" Amaimon spoke softly and stepped closer which made Rin jerk back, his heart now pounding as they stared into each other's eyes.

Amaimon blinks, feeling his heart beat. "If I get closer.." He trailed off and grabs Rin's wrists, pushing him against the wall as his cool lips touched the Raven. He removed his grip and tugs on his pants as they start to fall down.

"W-Wait! Do you know what your even doing?"

"Of course I do."

The greenette held Rin's member gently, licking all the sides and assumed he was sensitive as he looked up at the flustered boy, his cheeks were red and bites his thumb, he devoured him whole and bobs his head until he came on the greenette face. He accidentally let out a moan and covers his mouth in embarrassment.

"That was quick." Amaimon stood up and licks some of his release off his face, nearing Rin once more. His hand went to his tail stroking it softly and the other let's out another moan, trying to push him away as tears brimmed the corner of his eyes.

"S-Stop!"

He felt his fingers stretching him out and clings onto the greenette like his life depended on it, he cried out in pleasure and couldn't help to release once more. He leans against the wall, panting heavily as his eyes were half lidded.

"I hope you don't think we're done here, it's my turn to cum."

Rin eyes widen and seriously tried stopping him, he had enough with Amaimon. But it was too late, he thrusted himself inside the smaller demon and he clings to him once more, he penetrated in him quickly.

"N-Ngh! S-Slow down! A-Ah!" He lets out several moans, tears rolling down his cheeks. He squirmed when he felt a bite on his neck, "You can bite me if you want, if you keep holding me so tight it will be difficult for me to move faster."

Is he crazy?!

Amaimon continued to thrust inside him deeply, hitting sweet spot which made Rin arch his back and moans his name for once. "A-Amai-san!" The greenette shudders and after a few more movements he came inside of him.

Rin passed out right after and surprisingly he was laid down on the bed with a warm blanket over his body, he was so exhausted he couldn't even move.

In order to catch a demon, you have to be a demon.

I hope you guys like this trash xD

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