Madness
Ryo is consumed by the resurrected Lord of the Demons; Ryo is haunted by the idea of being possessed by a demon. Source: crunchyroll
Aired 21/09/2002EP 4 - Madness
2002
Demon Lord Dante
While sleeping one night, Ryo Utsugi had a nightmare of monsters attacking him. One day he learns a mysterious power to let him hear voices and have visions of girls getting killed, but one night he hears the same voice.
(Source: Anime News Network)