With the second season making an April 14th, 2022 debut, Netflix later revealed that a third season is in the works and that it would be the final season.
The manga comes from Eichi Shimizu and Tomohiro Shimoguchi which began in 2011 and has eleven volumes out so far.
With the show still on track for a spring 2023 debut, Netflix has now dropped a new promotional video below that gives us two new characters with MAO as Balkyua and Koji Ishii as Mephisto.