Blue Exorcist (2011)

In a world where humans inhabit Assiah and demons lurk in Gehenna, the two realms are supposed to remain separate. However, demons often breach this boundary, possessing beings in Assiah. Exorcists are the brave souls who combat these threats. Rin Okumura, cursed as the son of Satan, embarks on a journey of vengeance after his foster father sacrifices himself to protect him. Determined to honor his memory and conquer his lineage, Rin enrolls at True Cross Academy, where he trains alongside fellow exorcist hopefuls to harness his powers and confront his dark heritage.