Hermaphrodite Phantom Thief Ivy

To return the gems the Himeno family stole and hoarded, the homeroom teacher Yasuko Kasai sneaks in disguised as the Phantom Thief Ivy, meting out spankings to the rebellious Maika along the way. When Maika captures the thief's secret, the tables turn and Ivy is made to pay for every humiliation — one by one.