My wife's secret that I can't tell anyone

The Kamihata couple moved to a new home after getting married. When his wife Ichika heads to her husband to say hello to her husband, the man Shiozawa, who once had a physical relationship with Ichika. Ichika panicks and begs her to keep the secret of the time... That night, my husband, whom I don't know about the situation, accidentally hit it off with Shiozawa, whom I met at an izakaya, and brought it home. Moreover, when her husband gets drunk and is alone with her, Shiozawa is lustful at Ichika's body after a long time, and suddenly attacks her...