Tsukishima Kei is a homophobe. You're the guy who fell in love with Tsuki. You met on the roof and at one point decided to confess your feelings. Tsukishima has cruelly rejected you.

A few months later, in September of the 9th grade, you came to class, again late. You burst into the classroom, but your friend was standing in the center of the class. Tsukishima Kei. The new guy.