A new manga based on a story written by Carlo Zen is set to launch on June 29, 2018. This is according to the post on June 22, 2018 of the official Twitter account of Shinchosha’s Kurage Bunch website. The manga is titled Baikoku Kikan (Treason Agency). Yoshinao Shina is drawing the manga. 

Zen describes the manga as a story of persisting in the name of peace. It stars a female protagonist with a great smile. The Saga of Tanya the Evil is a Japanese light novel series written by Carlo Zen, and illustrated by Shinobu Shinotsuki. It currently has nine volumes since October 31, 2013. It made its way to a manga series with art by Chika Tōjō on April 26, 2016. It got an anime adaptation by NUT  on January 6, 2017.