Sakura and friends travel to a world of magic and mysterious learning. When Syaoran opens one of the books in the huge library, he is transported to a different dimension that resembles medieval Japan. There, he witnesses the hardship of the family of a feudal lord who strongly resembles Kurogane. Sakura, the princess of Clow, has a strange power that could change the world, and lives in an alternate-reality world with her childhood friend Syaoran, with whom she begins a series of journeys to other worlds.