A k-drama with innocent, gentle romance?

I'd say Healer the guy is kind, he's not rood at all or like most other leads, and I think the romance is innocent, gentle, but the whole drama it'self is a bit intense so I'm not sure that's what you're looking for. 

Hogoo's Love is a drama where the guy is very kind, pushover type. I'd say the romance for the lead couple is more soft and gentle than others, but the drama itself I wouldn't say was innocent. >_< It's a very easy-going drama though.

Queen Inhyun's Man the lead is very gentleman like, and the romance is lovely, but the drama, again is a bit intense. ^o^

It's been a really long time since I've seen it so I'm not sure if I'm remembering correctly but I think Flower Boy Next Door had a very gentle, innocent romance. And I can't remember the guy being rood at all, he's just a bit of a troll I think. =) 

The Girl Who Sees Something Smelly the main guy isn't a jerk, and the romance is very gentle soft feel. But again! The drama is a bit on the intense side, and there's a lot going on about murder mysteries, so I'm not sure you would be interested. >_<

I second Ugly Alert, but I didn't think it was all that draggy. It might be long but it has amazingly cute romance between the all of the couples. the drama might be a bit slow at first but it's so good when you get into it. :)

You who came from the stars.
Kill me, Heal me.

Kingyo Club.

That Fool
When Spring Comes
Glorious Day

All of these dramas have kind male leads. In each drama the leads develop a crush and start an innocent romance.