Ruma, she is a schoolgirl, she always goes to school wearing a mini-skirt showing the sexy lingerie she likes to use, she is not the least bit concerned about it and actually likes that anyone looks at her, particularly the boys.

She loves sex and she always chooses a different student to have sex with, she leads them to the school warehouse and gives them a fellatio and all different erotic things, she never have sex with the same guy and for those that may get obsessed over her or tell about her "hobby" she threatens them to say she was raped so no one dares say a thing.

There is a student, Okada, that knows about this and seems to not like that Ruma has sex with as much students as she can, "she is having sex yet again with a different guy", he always follows Ruma to the warehouse and just listen outside how she is having sex, of course Ruma has noticed this and soon approaches him...