A story of two pairs of mother and child. - Tatsuo Takayama, a boy who goes to a university in Tokyo and lives alone. - Due to the renovation of his house, his cousin Yoshio Akiyoshi and his aunt Taeko Akiyoshi are the house of his mother Kayoko Takayama. - In other words, he lives in Tatsuos parents house. - One day, Tatsuo returned home as originally planned, but he could not forbid sexual excitement for his mother, and after an obscene delusion, he repeatedly sexually acted and even vaginal cum shot. - At the same time, Yoshio spends his days in agony with the beautiful ass of his own mother, Taeko Akiyoshi. - And I also witness the mother and child incest of the Takayama family. - Then, Yoshio tries to come up with an obscene plan, aiming at Tatsuo who has left the room after one shot.