Mio is a slender, busty married woman. Once a month, when she sees a man, she feels an urge to lick his body. She doesn't know why. However, this time, she just couldn't suppress that urge. She doesn't have any problem licking her husband's body, but she licked the plumber who came to inspect the waterworks, and then her husband's brother, whom she hadn't seen in a long time...