Ao no Exorcist Movie

True Cross Academy is preparing for a massive festival, and Rin Okumura is assigned to help keep demonic trouble away from the celebrations. During a mission with Yukio and Shiemi, the soul-devouring Phantom Train breaks free and tears through the city, leaving Rin responsible for a childlike demon he names Usamaro.

Usamaro seems harmless and quickly grows attached to Rin, but his power to erase painful memories carries a terrifying price. As the festival approaches and people begin forgetting what matters most to them, Rin must protect his new friend while confronting a threat born from the very desire to escape sadness.