It was reported that CLAMP “xxxHOLiC / Rei” will be serialized again in Young Magazine (Kodansha).

This was announced in the “Official Comic Guide xxxHOLiC / Return Yumewatari Engi” released today April 20th. In “xxxHOLiC / Return”, Yuko, the mistress of “Mise” grants her wishes in exchange for “compensation.”
And her assistant, Watanuki, a boy who attracts youkai called Ayakashi, are mysterious guests. It is a sequel to the dark fantasy “xxxHOLiC” where you encounter strange events, and up to 4 volumes have been published.
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In addition, “Official Comic Guide xxxHOLiC / Return Yumewatari Engi” is an “xxxHOLiC overview” that summarizes the character introduction of “xxxHOLiC” and the time series of “basket”, “return”, and “Tsubasa” necessary for reading “return”.
Beginning with “Return” Volumes 1 to 3, “xxxHOLiC / Return Kimonoroku” introduces the synopsis and episodes, and the story of “xxxHOLiC” told in “Tsubasa” is read from the perspective of “Tsubasa”! “Tsubasa and xxxHOLiC / Return” etc. were recorded.
Source: Anime News Network