Strike the Blood, Vol. 17 (light novel)

Its a new semester at Saikai Academy and Kojou just barely made the cut Looks like worlds mightiest vampire--and lord of the fourth Dominion--wont be in the same class as his little sister after all. But thatll be the least of his worries when he finds out that the Japanese government is trying place the fourth Dominion under the control of someone else Kojous going to need help from alies, old new, to defend his title-and Yukinas job