Yurika Aoi has a son Takeru, who is her husband's stepson, who is reaching puberty, so she has many secret confidants. Already, his best friend Keisuke has been confessing to Takeru all day long that he wants to have sex" with his mother. Takeru also discovered that his mother was quite similar to the jav siblings, Keisuke and Takeru had other intentions. Takeru knew that his mother hadn't seen him for a long time due to a business trip abroad, so he was very excited. Taking advantage of that, Takeru invited Aoi's mother to participate in a game called "motherhood". Will Aoi resist the temptation? Where will Takeru and her mother go in this sinful relationship?