Knight Hunters: Eternity - Vol. 1: New Blood

In this spinoff to the hugely popular Knight Hunters anime series, assassin Sena Izumi goes undercover as a seemingly ordinary freshman at the prestigious Koua Academy to investigate a rash of student "suicides." When Sena uncovers a deadly plot between students and teachers to get rid of any member who doesn't perform up to standard, he summons fellow assassins Ken, Yoji, and Aya to fight against the evil in the school. This first volume features episodes 1-5.