A mother who has been raising her son Tsuneatsu on her own finds out that her son has a part-time job that is prohibited by school rules.

She is threatened by the head of the grade, whom she dislikes, on the grounds that he has been recommended for a scholarship...

He forcefully ejaculates into her mouth, and just when she thinks she is finally free, her clothes are stripped off and her body is played with.

Even though she doesn't want to, her vagina is throbbing with the knowledge that she will go crazy if they don't have sex.