I Became the Mentor of the Weakest Demon King

The protagonist lovingly raised a character from the raising simulation game <Evil Queen Maker>, but the final villain ended up completely making her his bride. After sending a long complaint about the ending… “Then try making a better ending yourself.” With those words, the protagonist gets transmigrated into the game as the “Teacher of the Demon King”! To escape this game, He must raise the Demon King and reach the ending. However, the Demon King they have to raise, “Seere,” is only seven years old and the weakest being in the entire world setting. As Seere becomes caught up in wars and conspiracies and continues to grow, she gradually starts thinking only about how to gain the attention and affection of her teacher, Nahen— “How are you even supposed to raise a child?” A childcare fantasy about a protagonist trying to raise Seere into the strongest Demon King.