xxxHOLiC: Manatsu no Yoru no Yume

A mysterious letter arrives for Yuuko, inviting her to an auction at an old mansion. Seven collectors, each driven by their desire to complete their collections, also receive the invitation. As they gather, the host fails to appear, and the guests begin to vanish one by one. Strange occurrences unfold, involving an enigmatic host and a mysterious girl. The nature of the auction, the identity of the host, and the fate of the collectors remain unclear. Obsession with possession intertwines with the host's enduring passion. A series of riddles and a bittersweet love story unfold, leading to a sequence of unexpected mysteries.