Her husband's younger brother visits Chisa, who is frustrated with her husband who is busy with work.He takes advantage of her brother's absence to press her into her physical relationship.She is confused by the sudden thing, but her lewd body left by her husband reacts to her brother-in-law's caress and forgives her relationship.After that, her brother-in-law visits the house aiming at her husband's absence.Chisa thinks she's not good, but builds up a relationship with her.Her brother-in-law suddenly stops coming to the house.She then finds herself expecting a visit from her brother-in-law...