After her mother-in-law passed away, her father-in-law Toru is left alone, and now his son Kensuke and his young wife Saki are living with him. Her energetic father-in-law always looks at Saki with lustful eyes. One day, her husband goes on a business trip to Kyushu from Monday to Friday. This is the first time Saki will be alone with her father-in-law for a few days...and on this occasion her father-in-law takes the opportunity to force himself on her. Saki continues to resist, but finally... "I'm sorry, honey." The father-in-law's lust burns for the ripe body of his son's wife. A full-scale S1 drama about parent-child NTR!!