Phantom mother, welcome to the forbidden mother-child swap! To the big breast wonderland of erotic aunts

Azusa takes refuge at her sister Reiko's house to save her son Naoto from her husband's violence. The good-natured Reiko welcomes them, but she has sexual feelings for Naoto that go beyond sympathy and motherly feelings. Meanwhile, Reiko's son, Shou, finds Azusa indulging in violent masturbation in the bath, something she doesn't usually do, due to the freedom of being away from her husband, and she is attacked. After having dinner in an awkward atmosphere, the two drink to liven up the occasion and begin to get erotically turbulent. Even when their sons ran away, feeling guilty and uncomfortable, their anger did not subside, and they headed to their sons' room.