There are many things I absolutely love about this drama.
The first would be the mature relationship between the Xiao Nai and Bei Wei Wei. It is a relationship filled with trust, communication and just pure adoration for one another, which is a combo I feel is often lacking in many dramas. Furthermore, it felt real and natural, which just made it more effective and enjoyable overall.

The second thing I absolutely love about this drama is the friendships. Literally all the friendships depicted with the main cast is really wholesome. It is supportive, fun, lighthearted and just a depiction of genuine friends.

The third thing I love about this drama is the way it depicts emotions such as sadness, pain and anger. There was a really natural and realistic depiction of it throughout the drama in various contexts (at least within the main cast). Considering many drama have this tendency to make such scenes over dramatic or lacking a realistic feel, I really appreciated it.

The final point, which has less to do with what was in the drama, than what was not in it. There was no over jealous reactions from the main leads, no parents who didn't agree with the couple being together or were constantly intervening, no suspected cheating drama, no "breakup and makeup" between the couple. These are some things that gets on my nerves fairly quickly when watching dramas, and it is something you find a lot in Chinese romance dramas.
Which is one of the reasons why I love this drama and keep coming back to it time and time again. Its such qualities which make it unique.

Now I have seen some poor reviews (someone else has given this a three out of ten), so I don't know if this is something everyone will love. But personally it was exactly what I needed from a romance drama.