Nanami, a big-breasted wife who lives in an apartment complex, suspects that she is having an affair when she sees her office worker husband frequently texting someone. Nanami witnessed her husband walking with a young woman one day. She was masturbating like crazy from her frustration and her frustration, and she met the eyes of her neighbor's middle-aged man through her open window. The man kneels on the ground and says he didn't mean anything bad. The two, who were never supposed to meet, will have a violent affair after witnessing this masturbation.
