Waiting for her husband's return after he was arrested for embezzling company funds, Saki begins working as a live-in dorm matron. The arrival of new resident Machiya triggers a series of troubles, forcing Saki to work hard while managing her daily duties. Amid her busy schedule, seeing Takinogawa fall ill with a cold and Koshinzuka injured from a fight stirs Saki's maternal instincts, leading her to gently care for them. Holding onto feelings of apology toward her husband, she gradually becomes an emotional support for the residents. One night, Machiya sneaks into Saki's room and threatens to expose her relationships with the dorm residents, marking the beginning of her emotional turmoil.