Ichika Matsumoto has an unhappy life with her husband, who is always working all day and not caring about her. He works so much that he gets stressed and often goes outside to smoke to relieve himself. Ichika's father-in-law is a gentle and thoughtful man; he always cares for his daughter-in-law and knows about Ichika's situation. So one time when his son went out to smoke, he secretly had an affair with his daughter-in-law, and this went on every day… until the daughter-in-law became pregnant…