A child who had been missing for ten years reappeared ten years later, but she had lost her past memories. She thought that there were only two people in the world who were her relatives. But when her memories gradually returned, she discovered what happened back then. How should she choose, whether to escape back to her world or accept the guilt of her relatives for her. . . With another brain injury, how should the hero and his brother take care of her... Please look forward to a choice about love, family, and friendship...