Mic Lo

Same author, similar themes.
Same kind of team work in law enforcement.
Both have a gritty urban atmosphere.
Both have a friendship/romance/bromance that tries to survive in a world full of inner and outer conflicts.

They both have similar themes of a women trying to progress in a competitive and male dominated industry, both have a mentor ML (although in very different ways) and a slight romance that isn't the main focus.

Both dramas focus on the lives and loves of different airport personnel. NF teaches more about the different jobs in an airport, while FTY deals more with the inner politics behind the scenes, but both are full of beautiful people and majestic aircrafts.

Both dramas are about women from the big city moving/returning to a small town. Meet Yourself has a lighter tone, but both focus on family relationships, generation gaps and the challenges these small and remote towns are facing, trying to keep up with a big and modern world.

In both dramas Wang Kai plays the tough older boss/mentor/love interest of a younger woman, although the setting is a bit different.

The aspect of characters having to adjust to living in a sort of parallel world is very similar, and they both have a mostly cute vibe.

The bickering and loving friendship between the two MLs has a similar vibe, plus the aspect of mystery.

Although the setting is different, both dramas have the bickering and gradual romance between an older mentor and his younger apprentice.

Although the setting is different, the dynamics between the master couple are very similar. The boss ML is always criticising the FL but he actually likes her and wants her to be the best version in herself. Both dramas deal with police work, although in different times and circumstances.

Same dynamics between the leads and with a similar shady background for the ML. In both dramas the romance is very quick and the ML is super obsessed, but the FL in Koi to Dangan has more of a personality.

Same boss from hell liking/tormenting his pretty secretary, but with a time loop twist. Secretary Bai Wants to Resign Everyday is a short web drama so it is lighter in tone than Secretary Kim, but the feels are the same.

Same crazy/cute atmosphere with a bit of gay panic, same self awareness and humour and a 80's vibe for the catchy opening song. I'm sure some of the team worked on both dramas or they are copycats, and I mean it as a compliment.