Mio, who felt lonely for her husband who could no longer care, spent her days comforting herself using toys. - When I indulge in my daily masturbation today, my neighbor's son, Kazuya, happens to come there. Mio, who was seen as a fool, targets Kazuya to satisfy her own desires. "If you promise not to tell anyone... I'll do a good thing" Every time she climaxes, Kazuya, who is not even old with her beautiful big breasts that shake and sway, immediately becomes obsessed with her.