Mio Kimijima is a slender, huge-titted married woman who, once every month, feels an uncontrollable urge to lick a man's body whenever she sees one. She has no idea why, but this time the craving is impossible to suppress. Licking her husband is one thing; then she starts licking the contractor who comes to inspect the plumbing, followed by her husband's older brother when they meet again after a long absence.