史上最強の弟子ケンイチ
martial arts, fighter, based on manga, martial arts master, discipline, resistance fighter, fight for justice, ecchi, shounen, anime, epic fights, master disciple relationship, grand, weak to strong, evil organization, didactic, hilarious, admiring, amused, appreciative, assertive, audacious, cheerful, comforting, empathetic, enchant, enthusiastic, euphoric, excited, joyful, optimistic, sympathetic, girl fighter, martial arts classes
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