Quiz no Hoshi is a trivia game with several gameplay modes; the main one is called "Heart of Stone" and is a story-driven series of quiz encounters with strategy board game elements. The plot involves a kidnapping of a little girl by the mafia, and the attempts of a boy named Hoshimaru to rescue her, all the while escaping from an impending apocalypse.

Quiz no Hoshi is a trivia game with several gameplay modes; the main one is called "Heart of Stone" and is a story-driven series of quiz encounters with strategy board game elements. The plot involves a kidnapping of a little girl by the mafia, and the attempts of a boy named Hoshimaru to rescue her, all the while escaping from an impending apocalypse.