Il Dang Baek Butler (2022)

They both have one case per ep kind of format. Also the leads in both the dramas can see ghosts

Difference:
While May I help you is romance based Missing: the other side isn't
But both the dramas are heart touching and worth watching nonetheless.

Both feel like a cute modern life romances
They're not the typical jerk meets airhead. Both are sweet, civil, and normal people who meet and have mutual interest in each other

Both are healing dramas dealing with very heavy topics in a light hearted way.
Both dramas treat the pain with care and respect
May I Help You has a fantasy component but that does not take away from the overall similar vibe.
Two people suffering and coming together to help ea h other and fall in love.

The protagonists hate each other at the beginning (enemies to lovers).
Also the neighborhood where he lives is similar and the scenery in general is quite reminiscent of Link.
And the policeman is the same actor in both dramas.

Both dramas include Ghosts
It also includes the Female leads being able to see and to communicate with Ghosts.

They both have the one episode/one case format along with an overarching bigger case through out the whole series. They're both very hopeful stories focusing on the humanity in people

Both titles deals with leads taking care of dead bodies and preparing it for funeral. Their job is looked down up and people sees them as bad omen. The prejudice, and hatred of people as mortician in both titles depicts the sad reality.