Dong-man often chats and gains hacking tools and information through the dark web with the moniker "Bird" with Kang Seon-ho (Jung Jin-young), a hacker with the alias "Yoon".

The series also shows conflict and harmony between professors and students within the school and corruption between criminals and the police force.

There was news on December 30, 2020, that Cha Tae-hyun received an offer for the drama titled then as Police Academy.

[14] There were reports on April 6 and 17 of Hong Soo-hyun and Seo Ye-hwa being cast in the series titled then as My Little Police.

[26][27] In late April to early May, the leading cast was confirmed for the final title Police University.