My mother, who used to come over regularly to clean the house, was hospitalized, and now that I live alone, my house is messier than it's ever been. Worried about me, my sister-in-law decided to come over to clean it up. However, no matter how much she cleaned up, there was no end in sight, and by the time she finished, it was already past the last train home. Just imagining being alone with my sister-in-law all night is enough to make me get a nosebleed, but the sight of her defenseless after a bath was even more stimulating...