Summer break has arrived, but while his other classmates are out having fun, Kimihiro Watanuki continues to work as compensation for the eccentric Yuuko in her shop. With the spirits and supernatural phenomena that bother him lessening, he pays his dues by cleaning, cooking, and doing whatever else the apparently lazy Yuuko needs. Watanuki, however, gets involved in a new predicament when Yuuko receives a mysterious invitation to a mansion whose owner seeks Yuuko's wish-granting ability. When he, Yuuko, and his classmate Shizuka Doumeki make their way to the peculiar residence, they meet others who were summoned by the same strange invitation. All of them are collectors of various unique items, drawn there by the chance to expand their collections. But as the collectors begin to disappear one by one, Watanuki and his companions must solve the mystery and put the case to rest, or find themselves in risk of danger. [Written by MAL Rewrite]

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. [Written by MAL Rewrite]

For the appropriate price, your dearest wish can be granted at the shop of the peculiar Yuuko. Kimihiro Watanuki wishes to be rid of his ability to see spirits, and so as payment, he works for Yuuko doing whatever she needs him to do, from cleaning to errands to even helping out Yuuko's other clients. In xxxHOLiC Shunmuki, Watanuki and his friend and rival Shizuka Doumeki enjoy a meal with their friend Kohane Tsuyuri and her grandmother, reminiscing about how they have changed since meeting each other. Later on, Watanuki has a dream in which he is visited by Doumeki's grandfather Haruka, who needs him to find some things in the family temple storeroom. Accompanied by Doumeki, he finds that this task is more akin to a treasure hunt, with each item leading them to another, and another, guiding them to an unexpected yet inevitable ending. [Written by MAL Rewrite]

Kimihiro Watanuki's life was never really normal. But in addition to his ability to see spirits, this sequel to xxxHOLiC finds him still slaving away for Yuuko, the bizarre owner of a strange shop, who promised to rid him of this ability. However, this otherworldly woman can only do so when he has worked enough to earn his wish. Such is the way for anyone who finds their way into the shop to have their request granted: a compensation equal to their wish must be paid. In this odd shop that straddles the world of the living and the dead, Watanuki finds himself doing household chores for the seemingly lazy Yuuko and her companions, while also helping out clients. Along with his classmates, supposed romantic rival Shizuka Doumeki and his crush Himawari Kunogi, Watanuki deals with the many misfortunes surrounding Yuuko's customers, as well as those that closely follow him and his friends. [Written by MAL Rewrite]