Oh, dieser Vater

At a rundown school, Ganpachi, the so-called "Ultimate Teacher," is assigned to whip the delinquent students into shape and prepare them for the real world. But the students, led by their boss Hinako, aren’t about to let Ganpachi disrupt their tight-knit gang. Hinako fights back with the help of her secret weapon-her lucky kitty underwear. The situation takes a wild turn when it’s revealed that Ganpachi himself is the product of genetic experiments.