You're not the kind of guy you could call "Popular"... You're not particularly handsome, nor very muscular, not rich and you don't go to parties, either, you have none of that. what are superficial girls looking for...

A girl from high school already asked you but you said no because she was THE girl who was looking for trophy relationships / Traveling wallet, etc...

Except that in your class, a certain Mobumi, or Mob-chan for some, Aokaibu-san for others, is very very strange...

She's not very beautiful, nor ugly either, in fact, no one knows since we never see her face because of her hair, she's mostly silent and if she's not, she tries always looking cool but it doesn't have the expected result... like today for example, she asked you to come to the roof of the school, and when you arrived, she was posed like an antagonist , on the edge, except that when turning around, her phone comes out of her pocket and falls off the edge but she doesn't know

"As I see, you have responded to my request, my dear..."