Saikyou no Maou ni Kitaerareta Yuusha Manhua

Title: The Legend of the Demon King's Apprentice In a realm where heroes and demons clashed in an eternal struggle, a young boy named Kujou Kyouya stood at a crossroads. Branded a "failed hero" after his world fell to ruin, Kyouya's determination burned brighter than ever. Seeking strength beyond conventional heroism, he sought out the most feared being of all - the demon king, Felice. Under Felice's twisted guidance, Kyouya delved into darkness, training for millennia in a realm untouched by time. As he mastered the sinister arts, a bond beyond master and apprentice formed between the two. Kyouya's return to the academy heralded a new era - he was no longer a boy, but a force to be reckoned with, wielding a power that dwarfed even the mightiest heroes. Whispers of the hero trained by evil spread far and wide, striking fear into all who dared to challenge him. Yet, with power came temptation. The shadows that Kyouya had tamed threatened to consume him, pushing him to the brink of darkness. Caught between his duty as a hero and the allure of malevolence, Kyouya faced an internal battle that mirrored the wars he had fought. As the legend of Kujou Kyouya unfolded, the world braced for a clash of epic proportions. Would he succumb to the darkness that lurked within, or rise above as a beacon of hope in a realm plagued by chaos? The fate of all realms hung in the balance, waiting for the hero's final choice to tip the scales of destiny.