Bureau of Transformer (2019)

Both feature a hidden secret society where some people have animals countered parts, and will exhibit their mannerisms.

Both deal with hidden worlds and at least one regular person getting forced to join a team of otherworldly enforcers. Both have heavy comedic elements.

Same concept. A bureau that specifically handles the relationship between humans and monsters and a newbie who is different from his coworkers.

Both contain case-solving, humor, and heartfelt moments, and a grand arc that spans the entire season.

BoT is a modern, supernatural investigative procedural that pushes along the main character arc at a brisk pace. It matches the quality and style of some of the best Hollywood procedural shows in mixing side-splitting absurdist humor, astute social commentary, and heartfelt moments. The show replaces bromance with a more team camaraderie and realistic romance between ML and FL. The engaging and consequential cases and grand story arc culminates in an exciting finale.

The biggest issue is the poor subtitle quality limits the accessibility as much of the hilarity and context of the show may be bungled by subpar translation. Though fluent Chinese speakers will likely enjoy this quirky hidden gem.

Both dramas are about a police agency dedicated to crimes committed by non-humans who coexist alongside people on Earth without them noticing.

Both are similar genres: fantasy + comedy + life philosophy (or slice-of-life) + romance. And they are from the same production company ;)

Both are comedy that show monsters living in the city and the bureau that oversees them. The bureau's mission is to keep the existence of monsters a secret from the human.

Both dramas are about a seemingly normal man who is thrust into a paranormal world.
Both dramas have a mad sense of humour and crazy characters.
Both dramas have a tough FL who teaches the ML how to be a tough man.

Hao Yun, a vet at a private clinic, leads a mundane life until he accidentally discovers the world is inhabited by monsters. Worried about the secret of their existence leaking, monsters capture Hao Yun and attempt to erase his memories. When their attempts fail, Hao Yun is forced to join Monsters Bureau, where he solves cases involving monsters with the help of his new partner, Wu Aiai. As Hao Yun dives deeper into this new world, he learns that even monsters must deal with the mundane struggles of everyday life and the entanglements created by human emotion.