A story about two mothers and children. Tatsuo Kirishima, a son who goes to a university in Tokyo and lives alone. And a beautiful mother, Nagako Kirishima, who is looking forward to the return of her beloved son at her parents' apartment. And her mother, Miho Sakaki, who lives next door to her, her son's eldest son, Yohei Sakaki, and his second son, Yasuhiro Sakaki. One day, Tatsuo took her home as originally planned, but he couldn't help but be sexually aroused by her mother. I have sex infrequently. At the same time, Yasuhiro witnesses his mother Miho and Yohei having sex, and becomes jealous of her enviable relationship. Witnessing mother-to-child incest. And then, Yasuhiro Sakaki tries to come up with an obscene plan to target Tatsuo Kirishima, who has just finished his first shot.
