Suze is going to the aquarium with her childhood friend Lulu. But suddenly Lulu goes missing... Suze follows Lulu and wanders into the Aquarium of Fear. Then, a mysterious person calling himself "Retro" suddenly attacked him. Chris," the wife of the aquarium director, who helps Suzu to escape. Kitty," a girl who has been trapped in the aquarium for a long time. There is only one clue to escape... Become a creature of the aquarium And solve their "secrets"... Who is the traitor?

Suze is going to the aquarium with her childhood friend Lulu. But suddenly Lulu goes missing... Suze follows Lulu and wanders into the Aquarium of Fear. Then, a mysterious person calling himself "Retro" suddenly attacked him. Chris," the wife of the aquarium director, who helps Suzu to escape. Kitty," a girl who has been trapped in the aquarium for a long time. There is only one clue to escape... Become a creature of the aquarium And solve their "secrets"... Who is the traitor?