Mawangui Binnaneun Byeol

After his decisive battle with the Hero, the Demon King gained human emotions. Because of those emotions, he lost everything, but through a fateful encounter, he met a girl. Stella, an ordinary student at the Magic Department with average grades.. Isn't she a sloppy, reckless brat? I should make this fool of a person..! (Source: Naver, translated)