Adam no Hanamuko

Emerald, the land of love, is ruled by the Witch King and four great witches, the Four-Way Witches. Noel is the son of the Four Witches, but he is a dropout who cannot use magic well. The day before his apprentice witch exam, Noel is preparing for the exam, when suddenly he is attacked by a robber and nearly loses his life. He wants to live, but a demon named Vel appears in front of him and says, "I have come for you as I promised." He then asks Noel to make the ultimate choice: marry him or die... (-deepL)