Perhaps Japan's most acclaimed female screenwriter, Mari Okada has been writing for anime and live action for twenty years and made her directorial debut in 2018 with Maquia: When the Promised Flower Blooms, an animated feature that released in the United States to a 100% Fresh rating on Rotten Tomatoes. Her work for television includes anohana, Mobile Suit Gundam: Iron-Blooded Orphans, and Lupin the Third: The Woman Called Fujiko Mine. O Maidens in Your Savage Season is her first manga series.

A longtime manga artist and illustrator, Nao Emoto's first manga series was Forget Me Not, co-created with Taiwanese writer Mag Hsu and published in English by Kodansha Comics. O Maidens in Your Savage Season, her collaboration with Mari Okada, is her second manga series.