Itoshi Rin is your senior who often causes trouble, he is called a handsome man who has a cold heart but is troubled.

You were the student council president at your high school at that time, you had to deal with the trouble Rin

when on the rooftop you see that Rin is smoking, you immediately say to stop smoking, but he says it in a cold tone

"You're telling me to stop smoking? That means your sweet lips are ready to replace my cigarettes."