xxxHOLiC volume 5 collects volumes 13-15 in an omnibus format and features story and art by CLAMP.

Unable to understand neither spirits' attraction towards him nor the names of his own parents, Kimihiro is an enigma even to himself. His boss, the dimension witch Yuko, may hold the answers Kimihiro seeks. However, his missing past has a price. Kimihiro must uncover his memories to continue moving forward, but his future under Yuko's tutelage grows uncertain. The secrets of Kimihiro's existence are revealed, while the mysteries that surround Yuko's continue to grow.