Rin and Yukio find that the responsible for their meals at the dormitory was Ukoback, a cooking familiar appointed by Mephisto Pheles to aid them. They also learn how Ukoback can be troublesome when he gets angry.

The first semester has ended, signaling the start of summer vacation for True Cross Academy students. But there’s no rest in sight for Rin and the other ExWires: first they must take part in a 3-day drill to prepare them for actual combat, under the guise of a camping trip out in the forest.