Watch Fukai ni Nemuru Oujo no Abaddon The Animation – Episode 1 English Subtitles

Deep within a dark, forbidden forest where no soul dares to venture lies the ominous Aya Koji Manor. While others stay far away, Yamanobe, a college professor and close friend of the manor’s master, Aya Koji, harbors a deep fascination for this ancient, decaying estate.

After finally securing permission to enter, Yamanobe and his research assistant step inside the eerie mansion. Their mission: to investigate the chilling paranormal phenomena and unexplained mysteries that have plagued the manor for generations. But as they cross the threshold, they soon realize that some secrets are better left buried in the dark.