OHSTORY

Ae Ri, a struggling part-timer supporting her ailing mother, faces turmoil when her mother foregoes a long-awaited heart transplant and mysteriously disappears. Amid the chaos, Ae Ri receives a call from Seo Jin, a man claiming to be from 31 days in the future, pleading for her help. Seo Jin, once a successful construction company director, is shattered by his daughter's kidnapping and his wife's suicide. Desperate to undo his losses, he strikes a deal to restore everything—with Ae Ri's help—calling her at precisely 10:33. (Source: MyDramaList)