Rei was married to a kind husband and lived a happy life. But one day, her husband's father, who she hadn't heard from in a while, came to visit. Her husband resented his father for abandoning his mother and causing him so much trouble. However, with Rei's kind encouragement, who couldn't leave her father-in-law alone with nowhere to go, she decided to let him stay with her for just a week. But that was the beginning of a mistake...
