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 which 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.