In order to help fulfill his promise to Yoite, Miharu has defected to the Grey Wolves, pretending their charismatic leader's philosophy has swayed his allegiance. His first assignment is to accompany Yukimi, Raikou, and Yoite to negotiations at an academy run by the Kouga ninja in order to obtain that clan's secret art scroll, Daya. But when they arrive (after unpracticed Raikou drives Yukimi's tiny car into a lake), they find they're not the only ones to receive an invite, as a very surprised Kumohira-sensei and the Banten gang are there, too, and with a similar agenda. When nightfall brings out the school's youthful assassins, both parties get caught up in the chaos of messy internal Kouga politics and have to focus on surviving the night before worrying about getting their hands on Daya.
Yoite thinks Miharu's only helping him to save his Banten friends, but that original threat seems to have less and less bearing on the pair's cooperation and attachment to one another. And it's that quiet character development that really latches onto the reader and holds her attention, even when the details of the present conflict are anything but clear.