Mio feels lonely because her husband no longer cares about her, and spends her days comforting herself with toys. While she was indulging in her daily routine of masturbation, her neighbor's son, Kazuya, happened to come by. Mio, who saw her lewd behavior, sets Kazuya as her target in order to satisfy her own desires. Every time she climaxes, she says, ``If you promise not to tell anyone...I'll do something nice for you.''