Hotaru works diligently as a caregiver. She has a good reputation and is popular with the caregivers. One day, as she is about to return home after providing care, a sudden downpour causes public transportation to stop, and Hotaru is left with no choice but to take refuge at the caregiver's house. Public transportation starts running again in the morning. Hotaru ends up staying at an elderly person's house. A man and a woman staying in the same house overnight... age doesn't matter.