Please Come Back, Mister - I think you'll love this
Remember – War of the Son - it's pretty serious and doesn't have much romance (except the ending)
Samurai Sensei - this one has the insanily good humour... like seriously, is so so funny xD
Kazoku Game - has some good insanity, the kind of unexpected, impulsive one, that's for a better cause, but there's no romance
God's Quiz - a little bit of insanity coming from a kind of funny guy
Cheese in the Trap - the main lead is basically a sociopath or at least, that's what we're supposed to think at first
Maou - kind of dark and has little to no romance
Gap Dong - pretty dark, but the main character is bold and kind of funny at times, and there's also some romance