Kaiu Shirai debuted in 2015 with Ashley Gate no Yukue on the Shonen
Jump+ website. Shirai first worked with Posuka Demizu on the
two-shot Poppy no Negai, which was released in February 2016.
Posuka Demizu debuted as a manga artist with the 2013 CoroCoro series Oreca Monster Bouken Retsuden. A collection of illustrations, The Art of Posuka Demizu, was released in 2016 by PIE International.