Masao returned to his in-laws' hot spring inn after a long time. His mother-in-law, Yukiko, who greeted him, was a beautiful woman who looked great in a kimono, and Masao couldn't help but stare. At night, while peeping at Yukiko taking a bath in the open-air hot spring, Masao's erection wouldn't subside, so he asked his wife for sex, but his desire didn't fade. The next day, when Yukiko was bathing again, Masao finally assaulted her. Although she resisted, they crossed the line. From the next day on, the two continued their illicit relationship…
