Please give me some recommendations on some romance kdramas that are not too old.

Boys over bunga is one of the best kdramas i have watched.
Descendants of the sun
secret garden

I guess they are kinda old but Playful Kiss,Boys over Bunga and Protect the Boss are worth watching. Of the newer shows I Cinta Goblin.

Moon Lovers: Scarlet hati, tengah-tengah Ryeo <3


After watching Moon Lovers, which sadly isn't very popular in South Korea, I watched Boys over Flowers, which is ultra popular in South Korea, and was very underwhelmed.