Akdangdeurui Choeaeneun Na

After a life of family abuse and betrayal, Lumina Lanchoux, a supernatural Leggion being, is saved from the brink of death by her half-brother Endymion. Just then, her healing powers awaken, and she is discovered by Duke Hart, the most powerful living Leggion. He sends her back in time to age 12 with the mission of saving his son Karajan from death by his own superpowers. Under the care of House Hart, Lumina is set for a peaceful second life. That is until she learns of the duke's deadly secret.
(Source: Tapas)