Mika drowns in the tutor's meat stick in the next room where her son is studying because she wants to put her son in a good university. And Mina decides to have a forbidden relationship with her son, who can't concentrate on her studies, just once. Furthermore, Ritsuko approaches the teacher because she wants her son to spend as much time as a tutor. A carnal war between three mothers who give everything for their beloved son's passing! !