Three years into their marriage, Keita's wife, Momoko, lives happily with her husband who is five years younger. One day, her father-in-law, Tadanori, who had been living in retirement, suddenly shows up without any notice. Tadanori, who has had his eyes on Momoko for some time, starts to harass her when Keita is not around. Momoko, who struggles with infertility, is touched by Tadanori under the pretense of 'fertility treatment.' Even though she knows it's wrong, her sensitive body reacts...
