Carnival Phantasm is a comedy OVA series based on the Type-Moon Gag manga, Take-Moon by Eri Takenashi, the author of Kannagi: Crazy Shrine Maidens. The OVA series was created by Type-Moon to celebrate the company's 10th anniversary. The series focuses on funny and absurd situations happening to the various characters of the Type-Moon franchises, mostly from Fate/stay night and Tsukihime.