Aika is a flashy-looking but domestically-minded housewife who is frustrated by her husband's lack of success in having children despite their good relationship. A single, greasy old man moves into the same apartment complex as Aika. While she is masturbating to relieve her frustration, the old man comes to greet her as he moves in and witnesses the embarrassing scene. The two, who were never meant to meet, end up in an affair that is so intense it leaves them covered in sweat after witnessing her masturbating.