The fourth and final compiled volume of Kairi Sorano's Croa Chimera manga (pictured right) announced on Wednesday that Sorano will begin a new work on Mag Garden's Magcomi manga distribution website this year. The volume did not announce the new work's title. Sorano launched the Croa Chimera manga in the premiere issue of Mag Garden's Comic Garden magazine in September 2015 and the series abruptly ended in September 2016. Shirano explained that the manga ended for various small reasons, but primarily because of "my own weakness." Sorano's previous Monochrome Factor manga ended in 2011. Sorano's Mother Keeper manga ran from 2006 to 2014. Tokyopop published the first four volumes of Monochrome Factor before it shut down its North American publishing division in 2011. The JManga publishing platform also licensed both Monochrome Factor and Mother Keeper in 2012 but it shutdown last year. Monochrome Factor inspired a 2008 television anime series from director Yuu Kou and the studios GENCO and A.C.G.T.