Fate/hollow ataraxia is a visual novel developed by Type-Moon. It serves as a sequel and companion to the popular Fate/stay night series. Set six months after the events of the Fifth Holy Grail War, it follows the story of Bazett Fraga McRemitz and Avenger, as they experience a mysterious four-day time loop. The narrative combines elements of mystery, fantasy, and action, offering fans a deeper exploration of the Fate universe.