So i just watched cruel city and it was really good except i wanted more romance in it. I want more suggestions of dramas with like a bad guy who falls for an innocent girl (i know cliche!!!!) and then does everything he can to protect her! I have already seen healer and city hunter.... Also anything with the crime and romance theme would be nice like, I remember you or you are all surrounded!!!!!!!!! So any suggestions would be nice>......

Hi!!! :) I'd recommend you to watch..
Shark (K-drama) - http://mydramalist.com/6669-shark
Siren (J-drama) - http://mydramalist.com/15229-siren

If you like watch Two Weeks..I loved the drama, but there isn't much romance in it..http://mydramalist.com/7028-two-weeks
I just recently watched "Love Me If You Dare" (which I thought was totally awesome) and I think it fits the criteria of things you're looking for. Give it a try :) Oh, also "Secret" - this one is less of crime solving but there is a huge crime involved which serves as the main focus throughout the drama.
I loved "LOVE ME IF YOU DARE"!!!!!!!!! Thank you guys so much for the suggestions! I will check them out:)
I recommend The Full Sun (Beyond the Clouds)
Who Are You 2013 is about detectives that solve crimes and it has a sweet romance 
I'm not sure all of these fit to a tee but here's my suggestions

Cubic
GapDong
I Remember You
The New World
If you loved LMIYD, there is the airing drama When a Snail Falls in Love.
From what people told me : "Same producer and director. Based on novels from the same author Ding Mo. And xu xu is bo jiyan' s apprentice"

You can also try :
- To Get Unstuck in Time (cdrama and also a time-travel)
- Who are you (2013 kdrama, also ghost stories)
- Ice World
- When it's at Night
I can't believe no one has recommended this yet but if you really like Cruel City then watch My Beautiful Bride. It's the only other drama by the same writer. It isn't romance heavy either but one of the best dramas of 2015.