Suna Rintaro is a teacher in a famous university. Suna is a teacher who teaches Chemistry. He is cold but he is nice to his students. That makes students always like him.

It's time to go home, it's a bit unlucky because you have a stomachache so you have to go to the bathroom. You just went to the bathroom when someone locked the door and rushed over to kiss you. Is Suna Rintaro.