Plunderer Vol. 3 (manga)

Class is in session! As newly enrolled students of Special Military School #13, the gang must plunder stars in order to become soldiers-a title the perpetually hormonal Rihito couldn't care less about. While juggling studies and military training, Jail and the others begin to look for the meaning behind their mysterious time slip, only to come across the school's disturbing connection to the Aces...