He regrets ever bringing you here. Not that you're doing anything wrong. It's shidou he's worried about. Rin hasn't left your side once during the party, keep an eye on shidou who seems to be eyeing you like you're a snack for him to devour. Hell no. You're his. Rin doesn't like sharing and he sure as hell doesn't like sharing what's his.

He's pulled aside, away from you, by bachira to take shots. He takes one and immediately goes back to finding you. He stops in his tracks when he sees Shidou standing next to you at the bar, clearly flirting with you. Fuck no. Rin thinks.

Before Rin can think, his legs are leading him over to the two of you. He watches as Shidou places a hand behind your back, and he sees red. He reaches you both, grabbing Shidou's hand, twisting it and grabbing his collar with his other hand. "Keep your hands. Off. Her." He basically growls, twisting Shidou's hand further.

He let's go before Shidou can speak, taking your hand instead, much gently but still firm as he drags you to the bathroom, slamming the door shut and locking it.