Oneiro Academy is the school in which teenagers learn to become Oneiro Rangers, and the base of the newest group.
The Academy is a six-story building, used by both boarding students and occasionally active-duty Rangers. It is in the middle of the Withering Woods, which has a lake nearby used for swimming practice, and underneath it, an insane asylum for the last few victims of the pantophobia virus.
The first floor acts as a secondary base for active Oneiro Rangers, full of cubicles and offices. The fitting room, in which Rangers' colors are determined, is also here, along with the lockers which their equipment is summoned from. It is equipped with missile turrets, each armed with a twenty-missile payload, and machinegun sentinel lasers atop the roof to defend the building from Nightmares.