Hitose Yachiyo has always striven to be helpful: volunteering and sacrificing her time and energy in respect of her late mother's memory. When the opportunity arises to travel overseas as a relief volunteer, Hitose is quick to accept. But when her plane crashes, she suddenly awakens to find herself in a strange world of magic and mysticism. In a realm where reincarnations and fate dictate the lives of those within it, Hitose must discover how to get home and why a mysterious keepsake from her mother may be more important than she ever imagined.