Maeda first collaborated with P.A. Works to develop the Angel Beats! mixed media project in 2010, and they later collaborated again on the 2015 Charlotte anime.
Key, Aniplex, and P.A. Works hosted a livestream presentation on Sunday to announce the new The Day I Became a God (Kami-sama ni Natta Hi) anime project.
The P.A. Works animation studio producer Mitsuhito Tsuji revealed in April 2019 that he would like to work on a new original work with writer Jun Maeda.
P.A. Works stated on Twitter that since the project has been in development for a while, “the audio is pre-recorded.”