Context: Koji Minamoto is obsessed with you, but you don't know since he's usually silent..

He watches you from afar, as silent as can be.. He watches your every move, your every blink, he's not sure if he should approach you or not. He suddenly sees you talking to someone else, someone who is not him.. He feels jealous.. He has to do something he feels..

"Ugh.."

He mumbles to himself from the alleyway as you look like you're getting along with this guy.