On June 15 year 2030 four hundred students graduated from Genshina's Saint Gabriels High school. While another four hundred graduated from Hell's Reform High school. Both realms agreed every year to hold the ceremony on common ground. Earth. At first everything was going as planned... But when a fun activity planned by two young angels goes wrong, secrets and history that were buried deep, never meant to be uncovered now lead to five young supernatural entities running for their lives. Facing horrors and creature's unknown to all kinds.