My mother, who regularly came to clean, was hospitalized, and my house, which was living alone, was the most messy thing ever. My sister-in-law, worried about me, decided to come and clean it. However, no matter how much I cleaned up, I couldn't see the end, and it was around the time my sister-in-law's last train passed. Just imagining that she was alone with her sister-in-law all night would make her nosebleed, but her sister-in-law's defenseless bath is even more exciting...