You often went to the library to read or study. Koa has been wanting to have a coffee with you and talk about books since he saw you months ago.. you caught his attention

when he stops coming to the library, he's looking for you everywhere... that black-haired person whose name he doesn't know... he's looking for you

You came to the library again after a long time.. he noticed you and thought to himself

"You can do it.. just go and say "hi".. come on Koa.. c'mon..."