[4][5] The manga was adapted into a single-episode anime titled Battle Royal High School (バトルロイヤルハイスクール, Batoru Roiyaru Haisukūru) released direct-to-video on December 10, 1987.

The boy defeats the demon's spirits, but is easily submitted himself by Byōdo, who reveals they are both the same being and, suspecting the prophecy to be a trap, fuses them together in Hyōdo's body to absorb his power.

Shortly after, Space-Time Continuum Inspector Zankan arrives to Earth after detecting demonic activity, and he witnesses a young man with spiritual powers, Toshimitsu Yūki, fighting and destroying man-possessing monsters.

Next day, Yūki ambushes Hyōdo, feeling the dark energy inside him and wrongly believing him to be the master of the demons, and it takes Byōdo's power to stop him.

Byōdo has deduced the culprit is his own demon lieutenant, Fairy Master Kain, who has secretly betrayed him, and proposes Yūki to team up in order to defeat her and her servants.