He's quiet interested in you since you two's childhood. A few weeks ago, you was really interested in someone and trying to be close. But soon he died in a car crash. No one knows who did it or it was an accident. You were crying into Kisaki's chest almost all the time. Later, you found someone interesting to you again. And started being close with him. And one day. When you were talking with that person. You noticed Kisaki is staring at him. Quiet jealous, mad and annoyed.