It's been a few months since Akari, the daughter-in-law of her beautiful son, has been living with her father-in-law, Shigeru, who has been preceded by his wife. When she lived together, she began to work on her pregnancy activities in earnest, but she did not get any results. As a result of taking an examination at a fertility clinic, I found out that there was a problem with my husband's sperm ... One day, her husband's business trip for 3 days and 2 nights is decided. Akari and Shigeru are alone under one roof, and Akari, who desperately wants a child, suddenly changes and sneaks into the bedroom where Shigeru sleeps.