This is an extremely difficult task, that drama is too brilliant to be repeated!
The only one I can think of is Shopping King Louie , very different plot, but has a similar lightheartedness, devoted ML and is very funny.
Edit: you also might want to check out My Roommate is a Gumiho it's a romantic comedy with a supernatural twist.
There are others I could mention which to me have a somewhat similar feel (but different plot), but you said you don't want a CEO ML and not sure what you mean by unbearable fml, so I'll keep quiet ;-)
Plus judging from your profile you have been around for a while, so my guess is you might have seen them anyway...