Granbelm
Under the light of a full moon, ordinary high schooler Mangetsu Kohinata finds herself transported to an alternate reality where six warriors take part in Granbelm, a series of battles waged by mages piloting enormous magical mecha. Mistaken for an enemy and attacked by the participants of Granbelm, Mangetsu finds herself swept up and overwhelmed by the tide of battle — until she is rescued by Shingetsu Ernesta Fukami, a mage who will need Mangetsu’s help to win Granbelm once and for all.