I Became the Master of the Weakest Demon King

After dedicating countless hours to meticulously raising a character in the simulation game "Evil Queen Maker," a devoted player is left stunned when the final villain abruptly claims his creation as his bride. Outraged by the unsatisfying conclusion, he submits a lengthy complaint to the developers, only to receive a cryptic response challenging him to forge a better ending himself. In an instant, he finds himself pulled directly into the world of the game, trapped within its mechanics with no clear way out. To escape this digital reality and return home, he is given a singular objective: he must raise the Demon King and guide the story toward a proper conclusion. However, the task proves far more daunting than expected. The Demon King he is entrusted with, Seere, is merely a seven-year-old child and the weakest being in the entire world. With absolutely no experience in childcare, the newly named teacher Nahen must navigate a treacherous landscape fraught with war and political intrigue while figuring out how to nurture a vulnerable boy. As Seere gradually grows older and stronger amid the surrounding chaos, his priorities begin to shift in unexpected ways. Rather than focusing solely on conquest, the young Demon King becomes increasingly consumed with earning the attention and affection of his mentor. What begins as a desperate struggle for survival transforms into a unique parenting fantasy, following one man's extraordinary journey to mold the world's frailest child into its most powerful Demon King.