An absolutely secret relationship. I've taken my son-in-law's heart and body. Even though I know it's wrong, I can't stop. Tsubaki was drinking late-night sake and listening to her son-in-law's complaints. Perhaps because he'd been drinking, her son-in-law hugged Tsubaki. Feeling lonely herself, Tsubaki gradually accepted him… One night, the son-in-law sneaks into Marika's bedroom. Knowing about her daughter and son-in-law's strained relationship, Marika accepts him... The son-in-law seeks forbidden pleasure on Natsuko's body. Natsuko knew it was wrong, but she thought this way she wouldn't feel lonely... Once upon a time, the only position allowed in marital relations was missionary. Ayako, who only knew that, found her daughter and son-in-law's acts shocking...
