Maki can't hide her joy when her son, Kazuya, who was a shy and bullied child, brought his childhood friend Junkichi. In fact, Junkichi is the ringleader of the bullying, and without knowing that, Maki begins to close the distance between her... Junkichi, who shows an unusual obsession with her mother in her fatherless family, takes advantage of her kindness and pushes her down. Maki cums every time she rubs the back of her vaginal wall that she hasn't touched for a long time. In her reason, she refuses him, but her body gradually cannot suppress the pain in her womb.