xxxHolic Volume 05: 11/02/11
XxxHolic Volume 05 by CLAMP has three mini stories and one point of crossover with Tsubasa: Resreservoir Chronicle that hints at the arc plot. The ministories involve Watanuki helping a little girl who is lost, a quiet girl sprouting wings and the rescue of a mountain spirit, the Zashiki-Warashi.
Watanuki gets a little more character development through a flashback of his friendship with a boy who is also tied to the April Fool's Day. The boy helps Watanuki manage his spirit problem by showing him a few tricks. As the friendship develops it's clear that something is not quite right with either boy. In light of the arc plot, though, this flashback is both intriguing and somewhat troublesome.
For the arc plot, Syaoran and friends send something in exchange for the food sent to them by Mokona. Their tardiness in making the delivery has Yûko worried, though she pretends she's just fretting over White Day.
By this point in the series I was well and truly hooked, as was my son. We went from requesting one volume via interlibrary loan to two volumes.