One of the main leads in Dear M (Jaehyun) is from the same music group - NCT as Doyoung who is a main lead of Cafe Midnight.

Also a criminal romance, both with some special out of this world aspects and in both main leads are implicated in a criminal case and a criminal wants to kill them.

Abyss: there's this magical ball that can revive people, the female lead is a prosecurator

I hear your voice: the guy is able to hear peoples voices when he looks in their eyes, the female lead is an attorney