the mangaka tell us about kotani's 1st love to let us know why he isn't sincere about his feelings anymore. he looks back and think that it was silly of him to be honest, and he is kind of ashamed, so he is never true to his feelings, he pretends to be a cold person, when actually he is a cute romantic and pure guy :)
I wish that the first love culd come to give lessons in the School.... Just another issue... Hehe
All time i thought he will meet his first love. I don't quiet get why sensei (author) told us about his 1st. Only thing that is conected with main story are tears at the beginning?
But manga as all was cute and interesting :)