Ichika Hoshimiya lives with her husband's family in a two-household arrangement after marrying into the family, continuing to reside in her in-laws' home despite her husband's frequent business trips. Having left her job to focus on marriage, she is devoted to building a family with her beloved husband, yet there are no signs of pregnancy. Their marital relationship has grown cold due to his constant absence, creating a small rift between them. While her relationship with her in-laws is generally good, Ichika is troubled by her father-in-law, who drinks heavily every night and verbally abuses her mother-in-law when drunk. One night, the intoxicated father-in-law sneaks into Ichika's room, bringing an unexpected and disturbing turn to her married life.