The Oath of Love is a drama that great popularity not only because of the huge fandom of the actors playing the main roles. The script is rather simple. It lacks great tension and sometimes even sense, but maybe that's the point, because once the viewer gets used to this very light convention he or she will actually start to feel a certain pleasant lightness.
I won't lie, I quit this drama twice so weak was the story. The relationship between FL and ML was artificial, forced and trite. But at some point this changed and something really sparked between the viewer and the drama.
I don't rate this drama very high because it had too many shortcomings. However, I rate it above average for the fact that at one point it really brought something light and enjoyable. If you're looking for thrilling action, an intriguing script and intelligent dialogues, you won't find them here, but you'll find plenty of warmth and smiles, so if it's raining outside the window, I recommend this drama to improve your mood.