Maki, whose husband is assigned to work alone and lives with two mothers and children. One day, my son brought his classmate Kuroi home ... Maki, who felt motherhood in Kuroi who was lonely with one parent, gently hugged her. However, the bully Kuroi takes advantage of her good intentions and forcibly pushes him down ... Kuroi further approaches her and plays with Maki who is worried that she has a relationship with her son's classmate. Maki, who was at the mercy of the endless sexual desire of a relentless young man, gradually began to drown in the sweet stimulus that echoed throughout her body.