A secret university founded by the legendary Relic Hunters Miguel, Michael, and Hax seventeen years after the Divine Relic Wars. Hidden from the public eye, R.H.U. trains Yaol users, Relic Hunters, and future protectors of humanity while concealing its existence from C.E.M., a government organization dedicated to controlling Yaol-related incidents and suppressing knowledge of Yaol from the general public. Beneath its appearance as an ordinary university lies a world of dangerous missions, Divine Relics, supernatural powers, rival factions, and students striving to become legends.