I love this drama. So much.
The theme of the show is loving yourself enough to acknowledge that the world will never and doesn't need to revolve around you, people don't need to like you, and you don't have to be perfect just to fit what society regards as perfection. Loving yourself is the sincerest form of maturity because then, you can overcome anything that comes your way. Nan Nan found love, but not because she was insecure and was looking for someone to validate her self worth, but because love came at a time when she had accepted herself as she is. Love, to her, is not a complement, but rather a compliment.