Psycho Diver: Soul Siren 1997

"Psycho Diver: Soul Siren" is an original video animation (OVA) released in Japan on May 21, 1997, and later in North America on VHS by Urban Vision on August 26, 1997.
The story follows Bosujima, a "psycho diver" who can treat people with psychological problems by entering their inner world.
He is hired to help Yuki, a young female pop star whose mind is being controlled by a sinister cult.
The film is set in a dark world of private terror where Yuki is haunted by violent memories and discovers psychic powers she cannot control.
Bosujima must descend into her turbulent soul to set things right before the inner demon triumphs, but he soon realizes there are others who will stop at nothing to control Yuki's fate.
The film is described as a mind-bendingly original and thrilling anime, a violent horror story of troubled souls and inner demons.
It has a runtime of approximately 48 minutes and is directed by Mamoru Kanbe.
The film has received mixed reviews, with some critics noting that it is short and leaves many unanswered questions, while others appreciate its original story and visual style.