After several years of marriage, Kasumi was planning to buy a home with her husband when he suggested they temporarily stay at her father-in-law Shozo's house. Shozo, who lost his wife a few years ago, once carried himself with confidence, but now appeared broken and defeated. Worried about him, Kasumi felt she had no choice but to support him. Despite her care and attention, Shozo remained depressed and withdrawn. Concerned for her stepfather, Kasumi began recalling his younger days and started sharing intimate moments with him, treating him almost like a husband. This warmth and affection gradually brought new light into Shozo's heart.