Riddle Joker is a visual novel developed by Yuzusoft, released in 2018. The story is set in a world where magic and psychic abilities exist. It follows the protagonist, who infiltrates a school for students with special powers to investigate potential threats. As he navigates this new environment, he forms relationships with his classmates, each with unique abilities and secrets. The game combines elements of romance, comedy, and mystery, offering players multiple story paths and endings.