Kenta Ikegami is a mischievous student notorious for his relentless pranks, primarily directed at his science teacher, Machiko Mai, with recurring attempts to disrobe or grope her. Though academically underperforming, he channels sharp creativity into orchestrating schemes alongside his friends Kame and Kinzo, forming a disruptive trio. His skateboarding and frisbee skills contrast his classroom apathy, while his triumphant catchphrase, “Daiseiko,” punctuates successful antics.

Beneath his troublemaker persona lie flashes of empathy, such as temporarily reforming to block the vice principal’s transfer. Yet his boundary-pushing actions—manipulating Machiko into posing nude or exploiting peers—often overshadow these glimpses. Machiko tolerates his antics as warped affection but enforces strict limits, once slapping him harshly for tormenting a new student.

Their dynamic intertwines rivalry with reluctant camaraderie, collaborating against shared foes like romantic rivals while trading retaliatory pranks. Kenta’s strict mother disciplines his inappropriate behavior, though her efforts barely temper his impulsiveness. Cross-dressing for schemes and bristling at Machiko’s interactions with other men, including friends, highlight his contradictions. Rare introspection follows consequences, hinting at depth beneath his comedic facade.