Read Manhwa I Became the Master of the Weakest Demon King online in English. Also known as Becoming the Mentor of the Weakest Demon King, I Became the Mentor of the Weakest Demon King, The Mentor of the Weakest Demon Lord, 최약체 마왕의 스승이 되었다, and Choeyakche Mawangui Seuseungi Doeeotda.

After tearing into the ending of the game Evil Queen Maker, the protagonist finds himself trapped inside its world in the role of a teacher. His way back home is tied to one unlikely task: raise Seere, a seven-year-old Demon King dismissed as the weakest of all, until she becomes powerful enough to stand at the top.

What begins as a strange survival mission slowly turns into a tense mix of strategy, caretaking, and fantasy growth. Seere may be fragile now, but the world around her is anything but gentle, and every lesson could shape the ruler she will one day become. With danger, politics, and the pressure of an unknown future closing in, her mentor has to guide her carefully or lose his only chance to return.

This series may appeal to readers who enjoy fantasy training stories, demon king settings, and game-world transmigration.