Shoko, a married woman living in an apartment complex who suffers from sexlessness with her husband. In the midst of her painful masturbation, when she suddenly lifts her face, she meets her middle-aged neighbor, Nakata, who was peeking out of her window. Relieved by Nakata's sincere personality, who came to apologize to her later, she began to learn "poses useful for a couple's night" from him, who aspires to be a yoga instructor. The two, who were never supposed to meet, will have a violent affair after witnessing this masturbation.
