Hane is a female college student who loves her mother, who raised her alone, more than anyone else. But then her mother suddenly says she wants to remarry... The man her mother brings home is very kind. Hane is shy and not very positive about the idea of remarrying, but when she sees her mother's happy expression, her feelings change. However, that man, Tamura Yasushi, is a rare master of the penis and a bad guy. He brainwashes her mother with sweet words and sex after smearing an aphrodisiac on his penis. And when his mother's training is over, he sets his poisonous fangs on Hane!