One day, Kana-chan came to a rural town by herself to celebrate her grandmother's birthday. On the way, she saw an old man in trouble and decided to help him. However, the old man turned out to be a bad person and she ended up being held captive in his house. "If you want to get out of here, you have to endure the 20 things the old man presents you with." Will Kana-chan be able to escape from this house? KM Produce Co., Ltd.