As the title suggest, I would like to know some good kdramas. I do have some criteria on what interest me.

+Historical- I fell in love the theme after watching Hwarang, and it has intrigued me since then.
+Light theme- This one is not as necessary, it is just that I get super stressed over characters sometimes.
+Romance- I want the romance to be sort of...fluffy. I just have a soft spot for these kinds of dramas.
+Friendship- I like the build-up of friendship more than romance to be quite honest.

I hope this is not asking much, thanks in advance.