After shopping, Michi was wandering around alone when a man suddenly approached her and asked, "Hey, what are you doing? Do you want to go out for dinner?" Michi agreed. They ate a light lunch and then went to the man's house. At the time, Michi thought casually, "Well, maybe a one-night stand would be nice." However, when she was about to leave after enjoying sex with the man, he suddenly became a different person and took her prisoner. She cries for help, but...