Feeling lonely with her husband who no longer cares for her, Mio spends her days comforting herself with toys. Today, while I was immersed in my daily masturbation routine, Kazuya, my neighbor's son, happened to drop by. Mio, who was considered stupid, took Kazuya as a target to satisfy her own lust. "If you promise not to tell anyone... I'll do something nice for you."