Luca-kun wa Akuma de

A comedy about the Demon King's son, Luka, who goes to the human world to train to become a Demon King himself. However, Luka has an angelic, kind personality, and is also naive and innocent, which leads to many dangerous actions. Claude, the butler who accompanies him as a watchdog, watches over Luka with a slightly overprotective attitude, but is thrown into a frenzy by Luka's unconventional behavior, which exceeds his expectations... The story depicts the adventures of the future Demon King. (Source: Natalie, translated)