The main character, Shota, is an ordinary student. When he returned home as usual and opened the door, he was transported to a royal palace in a world he had never seen before. There, he meets the prime minister, Berlina, who informs him that Shota’s face looks exactly like the dead prince. Shota is asked to become the prince of this country and leave behind an heir, so he decides to have s*x with the wizard Torte and the female knight Eclair to make a baby.