First of all i am not a professional at this. So , I'm just gonna share my personal thoughts.
It is slow paced sweet drama . Every moment of this drama strengthen the main story or the bond between the main leads. It really creates moments which can be felt from depth. Happiness, sadness, comedy and romance are balanced in perfect harmony. It lets you feel every moment with different feelings. While watching this drama it lets you to get connected to all the characters which was really enjoyable.
OST in this drama is really soothing and very pleasant to ears. It's OST alone can make you feel at ease. If you have an average patience level with an interest in romance dramas i recommend this to you.