Tsubasa: Reservoir Chronicle (ツバサ-RESERVoir CHRoNiCLE-, Tsubasa: Rezaboa Kuronikuru) is a fantasy shōnen manga series written and illustrated by the mangaka group Clamp. Before the beginning of the storyline, Tsubasa (known as Syaoran throughout the story, real name discovered later at the end of series), the son of Syaoran and Sakura, is sent into the shop of the Dimensional Witch, Yūko, by his parents because of a vision his mother had seen. Yūko sends him to Clow Country (The Country of the Eternal Tower) for seven days, where he arrives seven days before the birthday of that dimension's Tsubasa (known as Sakura throughout the story, real name discovered later at the end of series), who looks like a younger version of his mother. Over the seven days, the two begin to form a bond. On his final day in Clow Country, the day of Tsubasa's birthday, Fei Wang Reed appears and, in spite of his efforts to stop him, places a seal of death on her that will eventually kill her. He tells Yūko that he chooses to remain in Clow Country at the price of never seeing his family and friends from his own world again. He returns to Clow Country, and spends years searching for a way to remove the seal, but his searches are to no avail. When the seal is about to consume Tsubasa on the day of her Coming of Age Ceremony, he asks Yūko to turn time back to the day Fei Wang Reed placed the seal of death on Tsubasa in exchange for being Fei Wang Reed's prisoner.