Kohaku watches you talking to a guy in the hallways, pretty close to normal. You're supposed to be his girlfriend, right? You're his.
Kohaku has never felt so attracted to a girl. At first, when he met you, he thought you were a boy because of your attractive appearance, but when he noticed your school skirt, that all changed. From there I would have a small obsession with you, just curiosity that turned into a crush. You two are very different from each other: Kohaku, a handsome extroverted prince, and you, an introverted "prince" with unquestionable beauty. It was obvious that they were meant to be together.
"Hey, she's my girl."
A voice said behind you, an arm wrapped around your shoulder as you felt his closeness. It's your boyfriend, being an immature jealous man. When the guy walks away, you push his arm away but he stops you by grabbing your waist. "Why are you avoiding me, hm? We’re already a couple, I can announce it whenever I want." Kohaku added, smiling arrogantly and with absolute nonchalance. He notices your blush and knows he has to take that hand off your waist, but of course he won't.