this manga is about a normal high school girl named Airi Hoshina that dreams of a perfect life with a perfect husband and family. One day she comes across a boy named Aram that returns her lost small mirror. (passed down from generations in her family) She finds out that this is no ordinary boy, but rather a prince from a different world hiding from his older brother Jeile. His bother put a curse on him where he cant use magic and every time he goes into the darkness he turns into an older version of himself. This spell, originally suppose to turn him into an old man, only half worked and he just turns into a teenage version of himself. Airi decides to help Arum fix the curse and return him back to normal but maybe his older version isn't so bad?