RQ: Jealous!Rivaille x Reader (AU): Envy

You giggled, holding up a hand to your face flirtatiously. "No thank you, Reiner. I'm fine."

Said blonde hummed a response, a coy smile on his lips as he matched his pace with yours. "If you say so." he replied. 

"I do say so." You replied with a chuckle. You continued to walk, transversing the hallways of the high school, reiner following at your heels and very obviously flirting with you the entire way. You merely continued to giggle and entertain his advances. 

Reiner slung an arm around your shoulder, pausing you in your tracks. "Say, (Name). Bert and I are going to go see a movie tomorrow, would you be interested in coming?"

You looked at Reiner, a surprised smile etched across your face. "Me? Why Reiner that's very sweet but-"

"-She has a date with me."

Reiner looked up, ready to retort, when he saw exactly who he was addressing. 

"Sempai!" he stuttered, immediately withdrawing his arm from your shoulder. 

Rivaille looked less than pleased with the two of you. He glanced your way, and you couldn't stop yourself from giving him a coy smile.

"Tch." he turned his gaze to Reiner, who was standing stiffly and looking nervously at the older male. 

"I couldn't possibly be catching you flirting with my girlfriend, could I, freshman?" he sneered. 

You half expected Reiner to salute, the way he was standing so stiffly. 

"N-no!" he yelped.

You glanced sideways at Reiner and chuckled, amused by his embarrassment and shock. 

"More than that, don't you have other things to be taking care of, other than trying to make advances towards (Name)?"

Reiner nodded, but remained rooted in place. When it became apparent Rivaille was waiting for him to leave, he shuffled away, tripping over Rivaille's outstretched foot on the way. 

Rivaille watched the freshman grow smaller down the hallway before turning back to you. 

The smile on your lips couldn't be extinguished. Instead, it grew wider with his heated gaze. 

This was probably the reason why you were suddenly backed into a wall, arms caging you in on either side.

You looked up at your boyfriend, a knowing smile on your lips. Before you had the chance to speak, Rivaille intterupted you. 

"I thought we already talked about this."

A low chuckle escaped your lips. "Talked about what?" you purred, looking up at him.

A bitter chuckle escaped Rivaille's lips. "You know exactly what I'm talking about." his voice was low and dangerous as he leaned down next to your ear. 

You closed your eyes and tilted your head to the side, away from his lips. "Oh?" You gazed at him sideways. "Could Rivaille possibly be...jealous?"

"Jealous my ass." he growled. Before you could respond, however, his hand seized your chin and tilted your head back into a lip bruising kiss. 

You made a small yelp as you were pressed further back into the wall, his hand coming up to push your head closer to him. 

Teeth grazed your bottom lip, biting down and tugging gently, but enough to bruise. Before you could gasp, he moved his lips down to your exposed collar bone, nipping hard enough to leave a mark you could not cover. Marking you as his, you supposed.

You didn't notice the hand resting on your waist, slowly coming to the hem of your shirt, lifting it up ever so gently. 

Just as you felt his cold finger against your stomach, a voice penetrated your thoughts. 

"Hey!"

You both looked up, Rivaille's lips still connected to your neck as he glared sideways. 

A teacher stood, hands on her hips as she glared at you both.

"Yes, miss?" You asked cheerfully, knowing fully the position you two were in.

"Detention for making out in the hallway, tomorrow, for the both of you."

Rivaille rolled his eyes. "Fine. Can we continue?"

You saw the teacher's face turn red, in anger of embarrassment you couldn't tell.

"Report to the main office, both of you."

Rivaille rolled his eyes. "Okay, fine."

You felt his body vanish from yours, his hand drag you down the hallway.

"This isn;t too bad." You quipped as you walked down the hallway. "After all, detention could be fun!"

Rivaille stopped and turned back to you, giving you a quick peck on the lips, dark bangs obscuring his eyes partially. "Oh yes." he purred. "Very fun."