Please help

Guys I have been trying to remember this manwha I read like a few years back, it had just started then so it must be complete by now ig.
So the only details I remember are
One of the mls was a detective and he probably had a list of names, other ml was related with some shady business, they meet in a bar perhaps and have a ons and later this other ml finds that list of names and he takes it it with him or something like that
Please if anyone can identify this manwha tell me??