GRANBELM

On the night of a blood-red full moon, Kohinata Mangetsu, a completely ordinary high school student, returns to her classroom to retrieve something she forgot... and finds herself caught up in GRANBELM, a battle to determine who is the one true mage. Shingetsu, a girl participating in the battle, tells her that the world once overflowed with magic. Confused, Mangetsu tries to run away, but then...

As dawn breaks, Mangetsu awakens in Shingetsu's apartment. On her way back home, Shingetsu tells her more about mages and GRANBELM. Determining that Mangetsu has no intention of fighting, Shingetsu prepares to erase her memories, but her technique is unsuccessful. When Shingetsu is about to give up, Mangetsu asks her for more information about GRANBELM...

Mangetsu meets Anna at school in a chance encounter, and Anna tells her that Shingetsu ruined her family. During lunch the next day, Mangetsu tells Shingetsu that she wants to participate in GRANBELM. Shingetsu offers to help her, but at that moment, a car carrying Anna and some of her family passes by...

Mangetsu experiences her second GRANBELM. As the battle grows more intense with all the girls' emotions running high, Mangetsu and Shingetsu struggle against Nene's ARMANOX, JI GUAN LONG. But all along, another mech is approaching them...

Nene reveals her identity to Mangetsu and Shingetsu, vowing to fight them fair and square. Then, on the next full moon, Mangetsu and Kuon face off against JI GUAN LONG together according to a plan they devised before the battle, while Shingetsu draws Anna away from them. As shots are exchanged, Mangetsu finally figures out where JI GUAN LONG is...

After getting a glimpse of Nene's past, Mangetsu realizes what it means to fight in GRANBELM, but at the same time finds herself with even more questions about it. Still, now she knows that every participant has her own reasons for fighting. Meanwhile, Anna attempts to steal the Fugo family's powerful magic stone, which leads Suishou to give up on her and leave the Fugo household.