At 22 years old, Eikichi Onizuka is a pervert and former gang member who surprisingly becomes a teacher in Great Teacher Onizuka. The show follows his wild and often absurd efforts to win over Class 3-4, a group determined to have him expelled from the school. Challenges arise, including a balding vice-principal, old foes from his motorcycling past, and his own unorthodox teaching style. Nevertheless, Eikichi perseveres in his quest to help his students, pursue a romantic relationship with fellow teacher Azusa Fuyutsuki, and claim his self-appointed title. The show also includes "GTO: Great Toroko Oppai♡" (Tomoko's Big Adventures) as a gaiden.