Her husband was assigned to a single job, and Hinami was living a life of repeated cheating without being able to endure loneliness. However, one day, her son-in-law Yuichi sees her having phone sex with her cheating partner. Sweat dripping from her voluptuous body, dripping drool and lewd juice overflowing endlessly from her crotch... Yuuichi is more lustful than angry at the excessively obscene sight his mother-in-law showed. Yuuichi makes an unexpected proposal to Hinami. "I'll be your partner in place of your father."
