xxxHolic is a show directed by Tsutomu Mizushima that is based on the manga series by the female mangaka group Clamp. The anime adaptations of xxxHolic saw two seasons released from 2006 to 2008. The anime was produced by Production I.G. studio and also received a film adaptation by the same studio.
The show ran for two seasons, the first season airing from April 7, 2006, to September 29, 2006. It ran for a total of 24 episodes. The second season, titled xxxHolic Kei, aired from April 4, 2008, to June 27, 2008. Two OVA series have also been made, which include two episodes each.
xxxHOLIC Season 3 update
While the story of the manga has not been wholly adapted in the two seasons, a third season could finish up the story and provide an end to the anime. Production I.G. has not made any official statements regarding the third season for xxxHolic, and it seems unlikely that a third season will be made.
Because Production I.G. is busy with other upcoming shows like Psycho-Pass and Attack on Titan, it is highly unlikely that the studio will pick up xxxHolic for a third season. Another studio might pick it up for a continuation or a reboot altogether.
The story of xxxHolic revolves around a teenager named Kimihiro Watanuki, who has the ability to see spirits and other supernatural beings. He is fed up with the fact that he has to see these creatures. Going toward his home one day while being chased by some spirits, he comes across a wish-granting shop and enters it. There, a beautiful witch named Yuko Ichihara greets him. Watanuki begs her to rid him of his ability to see spirits. Ichihara tells him that his wish will be granted, but he will be will have to pay the price.
Yuko demands that Watanuki work at her store, and she’ll help him get rid of his ability.