I was really hesitant about how many stars I should give this drama, however, the more I thought about it, the more I had to admit that this is a really great drama and probably one of the best Chinese drama. Let me tell you why I think so.
If you don't want to read the whole review, you can scroll down where you'll be able to find a summary of all the things I will mention.

1) STORY DELIVERY
I have to admit that the main plot is different from all the dramas I have seen. I like the way they added such a silly and yet interesting element to the story of the characters behaving like animals when sad, angry, etc. They could have explained the whole comet story a little bit more, but it won't hinder you from enjoying the drama. Also, the pace is perfect! Thanks to the pace of the story, nothing felt too slow nor too fast, which made this more enjoyable. Each episode had me feel several emotions; we could start the episode with a smile while ten minutes later we would be sad and then excited and just like that. This is not a bad thing because they made sure that the viewer got engaged in the episode without feeling bored, and more importantly, they did not add silly scenes when it wasn't necessary. I must admit though that even if it was delightful there's something that makes me think that they could have done better here; however, we have to keep in mind that this is not a fantasy story but more of a romantic drama in a fashion/business background and with a fantasy touch to it. This leads me to how they handled the delivery of the love story of the main couple.

2) LOVE STORY of main couple & CLICHÉS
I must say that I dislike how some dramas use clichés to make the story all lovey-dovey and such, but it just doesn't work. However, they did an excellent job here. Notably, they didn't make the main couple fall in love in two episodes for us to watch them argue and break up every thirty minutes because of miss-communication. We have a well-developed love story with some cliché arguments between the characters, but they are quickly resolved. Want to know why? Because our main couple knows what COMMUNICATION is! This is the healthiest couple I have ever seen in a damn while. The couple respects each other, say sorry and thank you to each other, although there are still some arguments they are often (if not always) resolved in a few moments as they talk it out. They deserve applause for not giving these characters the usual: "rich CEO and the just starting dumb designer meet each other, fall in love in episode two, break up in episode three because of a stupid reason, they get back together at episode four and stuff like that."

3) CHARACTERS & acting (?)
I don't want to go on. forever, but I liked most of the characters, so I'll talk about the things that turned me off a bit. First of all, the girlfriend of Miao Yu in the first few episodes is just... ugh... maybe it's just the actress that couldn't pull it off, but she had minimal emotional expression while most of the time she was just holding poker face. Wang Chen, our main female character, was cute, really cute, but I feel like she was quite flat and didn't have much character development. It's not that you will find her annoying, but after watching it, you'll notice how she didn't really grow much.


SUMMARY OF REVIEW
All in all, it's a really good drama, but then again it's not perfect. I really like how they went with a good pace - not too slow nor too fast but just perfect. They also added some fun scenes and entertaining characters which made the whole drama enjoyable, they had the usual cliché arguments which often lead to breakups, still, they made the relationship between the main couple healthy, so those situations didn't happen (except for one which I won't reveal). They could have worked on putting more effort into the character development of Wang Chen as we also came to see her fashion career and not only her love life - at least, that's what I lowkey also wanted to see.
If you want to watch this for the romance, then you'll enjoy it for sure as it has a lot of cute and funny scenes with really little useless drama.
If you want to watch it for the romance and all the other things, it would also be really nice, but then you'll notice a few small things that you might like or dislike depending on your taste.
Nevertheless, this title deserves more recognition because it's really great.