Shoko, a housewife living in an apartment complex, is troubled by her sexless marriage with her husband. While indulging in a melancholic masturbation session, she suddenly looks up and locks eyes with Nakata, a middle-aged neighbor who had been peeking in through the window. Feeling reassured by Nakata's sincere personality when he comes to apologize, she begins to learn "poses that are useful for couples' nights" from him, as he aspires to become a yoga instructor. The two, who should never have crossed paths, become involved in an intense affair that leaves them drenched in sweat, all starting from this chance encounter during her self-pleasure.
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