マガジンSPECIAL
A comedic "yonkoma" titled and written by Masataka Ono that depicts King as an aspiring manga artist, began on February 20, 2016 in "Magazine Special" before transferring to the "Manga Box" app on February 1, 2017 and ending later that year. Its chapters were collected into three "tankōbon" volumes. A manga adaptation of Mamoru Iwasa's novel, "", was serialized in "Shōnen Magazine Edge" from January 17 to September 2017 and shows how Ban and Elaine met in more detail. It is illustrated by Yō Kokukuji, titled and was collected into two "tankōbon" volumes.