Osamu Nishi started her manga career in 2011 with her one-shot Shonen K in Jump SQ., which won an honorable mention in the Jump SQ. Monthly Awards. Two years later, in 2013, she won the inaugural SQ. NEXT CUP with her one-shot Hotel Hellheim, which was later serialized in Jump SQ. in 2014. Her next series, Welcome to Demon School! Iruma-kun, started serialization in Akita Shoten’s Weekly Shonen Champion in 2017 and has a popular anime adaptation and is still ongoing to this day. In 2024 she began writing Ichi the Witch, which is serialized in Weekly Shonen Jump.

Shiro Usazaki is an artist beloved for her dynamic and detailed style. She made her manga debut in 2017 with the one-shot Welcome to the Film Department of Asagaya Arts High School in Weekly Shonen Jump. The following year, in 2018, she began her first serialization as the artist of Act-Age. In addition to the serializations, she also collaborated on a handful of manga one-shots, various illustrations such as cover art and light novel interiors, as well as some game-character designs. In 2024 she teamed up with Osamu Nishi to start the serialization as the artist of Ichi the Witch to the delight of her fans around the world.