Title: 2/5
There is nothing special about your title, and there is nothing that would draw me in.

Description/Foreword: 4/10
Your description is grammatically incorrect.  Since it is short, I will reword it for you.
“Minho and Suzy were childhood friends.  They promised each other that they would get married when they grew older.  However, something big happened to Suzy’s family and made her afraid of other people--especially guys.  She also forgot everything, even her memories with Minho.”
Sure, that isn’t the best rewording, but it gets the point across better.  English isn’t your first language, so why don’t you consider copying and pasting what I wrote into your description box instead?  It’s totally up to you.
As for your foreword, you don’t really include anything necessary in your character descriptions.  It would be better if you just took it out and replaced it with some kind of short author’s note or a prologue.

Poster/Background: 8/10
The red title doesn’t fit with the rest of the poster.

Characterization: 8/15
Suzy seems too much of a child.  She has a condition, but she even seems like a child at the very end of the fanfiction.  Other than that, you haven’t made the characters into anything believable or memorable.

Spelling/Grammar: 9/20
You have tons of grammatical errors.  First, you are unable to form complete sentences for a big part of this fanfiction.  A sentence has a subject--usually a noun--a verb, and an object--in some cases.  You forget to add verbs in the most critical places.  Some of your errors are understandable, considering that English isn’t your first language.  You should find yourself a beta reader that would be willing to go in and fix all of the grammar errors in your fanfic.  Besides that, there isn’t much you can do to improve on your own besides read literature and learn from other fanfiction writers.

Flow: 7/10
The flow was too slow in the beginning and too fast at the end.  You need to organize your ideas by planning out your fic before you write it.

Originality/Plot: 10/25
This plot is nothing new in the fanfiction world, and you don’t do much to make it yours.  The ending was unpredictable, I’ll give you that, but you didn’t put any other twists in.

Enjoyment: 1/5
I couldn’t fully enjoy your fanfic because the scene ruined everything for me.  Also, she killed her own father while visiting him in prison.

Total: 49/100

General Comments:
There isn’t much to say about your fanfiction in general.  There is room for improvement, but you’ve come a long way as a writer.  The fact that you’ve had enough courage to post your fanfic says a lot about your character.  Thank you for requesting a review, and this probably wasn’t the score you wanted.  Also, sorry for the long wait.