The official site previously revealed that a fourth season is in production with plans for an April 2022 debut.
After the spring 2019 anime adaptation of the manga series Yatogame-chan Kansatsu Nikki by Masaki Ando, a second season arrived with a January 5th, 2020 premiere.
Now, the official site has updated with a great new key visual of the cast below.
The manga has been serialized in the Monthly Comic Rex magazine and has over 200,000 copies sold so far.