Three years into marriage, her husband is always busy with work, but he finally makes time to plan a trip for their anniversary. The couple heads to a hot spring inn, enjoying sake together in an open-air bath while gazing at the rippling water. Sharing a rare moment in the mixed-gender bath, the husband, overwhelmed by fatigue, returns to the room and immediately falls asleep, leaving his wife alone. Feeling both disappointed and lonely, she wanders the inn to soak in the atmosphere when she's approached by a group of college students staying at the same lodge, leading to an unexpected turn of events.