Kdrama Recommendation Please

Hey everyone!! Can you please recommend me some Kdramas where there is no love triangle as such and the story is more focused between lead pairs but also need some jealousy thing :-P ( like What's wrong with Secretary Kim, Weightlifting Fairy Kim book Joo, Fight for my way, Cloy and so on like these)

Thank you for recommending but I have already watched all of these (*_*)