xxxHolic is a Japanese manga series written and illustrated by the manga group Clamp. The series, which crosses over with another Clamp work, Tsubasa: Reservoir Chronicle, revolves around Kimihiro Watanuki, a high school student who is disturbed by his ability to see the supernatural, and Yūko Ichihara, a powerful witch who owns a wish-granting shop. When Watanuki asks Ichihara to remove his ability to see spirits, she grants it on the condition that he pay for his wish by working for her. Clamp created xxxHolic to link the supernatural and fantasy series.