A couple like gaeul and jiyung

I want a drama that has a couple like jiyung and gaeul in boys over flowers. Like a playboy that start to change with a help from an ordinary girl that he didn’t know in the beggining, and I prefer them as a second couple but it’s fine if they’re the main.

In J-drama Orange Days is exactly such secondary couple.

Also Tw-drama What is Love main story is just about playboy changing for the female lead.