Season 2 adapts content from volumes 3 and 4 of the light novel.
Season 1 adapts volumes 1 and 2 of the light novel series.
Based on the light novel series written by Daisuke Aizawa and illustrated by Touzai. The light novel series began serialization online in May 2018 on the user-generated novel publishing website Shosetsuka ni Narou. It was later acquired by Enterbrain, who have published the series since November 2018.
Kage no Jitsuryokusha ni Naritakute! Season 1 was released on Blu-ray and DVD in four volumes from January 25, 2023, to April 26, 2023.
Kage no Jitsuryokusha ni Naritakute! 2nd Season was released on Blu-ray and DVD in three volumes by Kadokawa from January 24, 2024, to March 27, 2024.