xxxHOLiC - A Midsummer Night's Dream

Watanuki Kimihiro can see spirits and other assorted supernatural creatures, which is quite a bothersome ability he strongly dislikes. On the way home one day, while plagued by some spirits, he is inexplicably compelled to enter a strange house. There, he encounters Yuuko, a mysterious woman who claims to be able to rid him of the ability to see and attract the troublesome creatures – for a price. She demands for him to work at her "store" that grants wishes to people, and thus begins Watanuki's adventures through weird and wonderful events.

10 years after the events of xxxHOLiC Shunmuki, a melancholic Kimihiro Watanuki has taken over the shop formerly run by the mysterious Yuuko due to a promise he made to her. His companions Maru, Moro, and Mokona live together with him in relative contentment, and some familiar faces arrive every now and then: former rival turned-steadfast friend Shizuka Doumeki, and the former psychic prodigy Kohane Tsuyuri. While Kohane studies folklore under Doumeki at university, they encounter a case that is perfect for the master of the shop. Eventually, Watanuki receives a visit from Doumeki's grandfather, Haruka. He requests that Watanuki investigates his grandson's dreams. While inside the dream world, he discovers how their past adventures played out from Doumeki's perspective of view, leading Watanuki to discover truths from 10 years ago and secrets about the ties that bind their friendship.

Still working to get his wish complete, Watanuki finds himself into more mess than he can handle when certain facts about his everyday life gets revealed and when he needs to learn the lesson of Yuuko the hard way.

Tsubasa/xxxHOLiC project. A 4 part OVA consisting of two OVAs for each series, with plots linked together. Direct sequel to the events on xxxHOLiC - Kei, with special guests.