Title Recommendations based on Belle

Terrible events occur at an isolated hotel in the off season, when a small boy with psychic powers struggles to hold his own against the forces of evil that are driving his father insane.

Akira Fudo learns from his best friend Ryo Asuka that demons will revive and reclaim the world from humans. With humans hopeless against this threat, Ryo suggests combining with a demon. With this, Akira becomes Devilman, a being with the power of demon but with a human heart.