Tittle: 4.5/5

The tittle sounds nice. It sounds alluring and you would be able to attract readers. It also fits with the story, so the readers would be able to understand why it's called "30 Days". Although it's nice, it's somehow a bit plain. About one or two tweaks should do the trick. There's really nothing much to change about the tittle. It's simply just a bit plain and not as alluring as other stories.

Appearance: 8/10

The poster is really pretty. It didn't amaze me to the extent where I love it but it did reach my expectations for posters. I couldn't see the background though. The bold and the italics usage gave me a slightly hard time to read. I suggest not using the italics or the bold if you insist on using either one. The middle writing way doesn't attract me much as I don't really like it, but it looks okay with the whole story way.

Description/Foreword: 10/10

The description really attracted me to the story. It didn't explain much on why did Namjoo left and their whole background history, which makes it more intriguing. The letters were placed in a neat order and so were the dates. The foreword spoke of Changjo's own secret and it rises more curiousity. They're perfect.

Plot: 23/25

You story seems really nice. It's not like a lot of other cliche stories where people would be able to guess what would happen. Though it didnt seem to have much twists and turns is all and it seems to be like a few drama movies. Either way, I bet your story would turn out to be an amazing one.

Grammar: 18.5/20

It's nothing, really. Your grammar just needs a few tweaks here and there. It's nothing big and it's still understandable. I did spot a few typos of Namjoo's name and a few typos for a few more words. Also, the uses of 's' is also needed so that the story could be read easily. I found a few words where you didn't use an 's' like 'parent'. There were also some words that were in their sort-of short from. For example: 'because' to 'cause' and 'cause' is a whole different word. I suggest to ask/find someone to beta for you or read your chapters before hand to check for mistakes if you're a lazy person. If you're not, you can re-check and edit on your own. A co-author would do just fine, too.

Characterization: 10/15

Some of the characters came up suddenly and the only explantions were whose friends they are. It didn't really speak much of who they really are and how they act like. I'm pretty sure you'll get more into this in the future, but i just wanted to say it out.

Flow: 3.5/5

It moved a tad bit too fast for my own personal liking. There weren't many actions mentioned either. It seemed to move from one place to another though it's still in the same scene. Though it did move slow in the process of what the feelings are and such, which is nice.

Reader's comments: 5/5

Aye you got some amazing readers there wanting to check up 24/7 for an update!

Overall Enjoyment: 4.7/5

I enjoyed the story and I'm really attracted to it. It seems to hold a lot of secret and the mistakes are just minors, too.