Momoe, who works as a receptionist at a dentist's office, is suddenly confronted by Asanuma, a junior colleague who has been persistently following her from high school to university. Since then, Asanuma has been persistently coming to her clinic even though he doesn't have any cavities. However, one day, he suddenly stops coming... Momoe thought he was annoying, but before she knew it, Asanuma had filled her head...?! -Clumsy boyfriend-"