Mayu lives with her husband, an office worker, and her father-in-law, who has dementia. Ikushima, who lives in the apartment across the street, can't get up and is living a day-to-day life. One day, Ikushima finds a beautiful married woman (Mayu) who throws an old fan in the trash. He took the fan back to his room, repaired it, and started using it. After that, he gradually begins to peek into the life of Mayu, who lives across the street. One day, he secretly follows her when she goes out, and arrives at a suspicious sex shop...

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