Ai, who is serious, was not satisfied with her husband who has a special habit and secretly felt unsatisfactory. At that time, her brother-in-law, Bunta, suddenly visits the house. Her playboy's brother-in-law sees her help and skillfully argues ... Being swept away by his mouth, she has a relationship with Ai "once". She refuses Bunta, who relentlessly invites her after that, but her pleasure that shakes her whole body that her husband can never taste, the stimulus that squeezes her vaginal wall is indigo body Engraved violently ...