Maiyuki has to live with her stepparents due to her husband's transfer. Her stepfather was a very old man with a frightening sexual desire, and he used to hug her stepmother every night. Panting sounds that can be heard every night. Maiyuki's crotch ached from the passionate, bestial intercourse as their flesh clashed against each other. Her husband is indifferent, in contrast to her father-in-law. Maiyuki has a strong sexual desire and wants to have sex every night, but her heart gradually shifts to her stepfather.