It has been several months since Akari, my beautiful son's wife, started living with my father-in-law, Shigeru, who passed away. - When they moved in together, they began trying to conceive, which they had been trying to do for some time, but they had no success. - After undergoing a test at a fertility clinic, it was discovered that there was a problem with her husband's sperm...One day, her husband was scheduled to go on a business trip for two nights and three days. - Akari and Shigeru are alone under the same roof, and Akari, who desperately wants a child, suddenly changes and sneaks into Shigeru's bedroom...