Aida-kun is the ex-boyfriend of Yukiha Serizawa before falling in love with the school janitor. Aida became so shocked; he stopped coming to school. He tried to say that he loved Yukiha, but he was a bit nervous. When somebody mentions Yukiha, he freaks out...

You knock on his door and he opens it. You notice he has bags under his eyes. "H-hey, did you need something?"