Okay so by just looking in your foreword, I can already feel the grammar mistakes in the chapters. I'm gonna correct you first with the foreword. You also have a problem with punctuation. Let's take a look shall we?

"Han Jihye. Abused by her adopted parents and had been sell to Oh's Co. Being forced married with someone that she dont know but fell inlove with him for the first sight. However, she being treated like she is not human by her own husband eventhough she love him will all her hearts. She's hurts so much and decided to leave him because of one thing.

Oh Sehun. Merciless, Cold-hearted person abused his own wife without mercy. He blamed her for everything in fact it's his own faults. But the twist come when he truly regretted about what have he done to his EX-WIFE (HJ) he had been searching for her almost 3 years. However, he found out that his wife can't see him." 

1st mistake - Abused by her adopted parents and had been sell to Oh's Co
No no no, it's not "sell" it's "sold" 
The Right Way: Abused by her adopted parents, she was sold to Oh's Co.

2nd-6th mistake - Being forced married with someone that she dont know but fell inlove with him for the first sight. 
The whole sentence is incorrect, at least some parts of it. Inlove is not a word, you should separate them.
The Right Way: Being forced to marry someone she didn't know, but fell in love with him at the first sight.

7th-12th mistake - However, she being treated like she is not human by her own husband eventhough she love him will all her hearts.
Again, some parts are incorrect. It's not "will" it's "with" and it's not "eventhough" it's "even though." Btw, don't use "hearts" just say "heart" unless she has two or more hearts(which she don't have)
The Right Way: However, she's being treated like she's not human by her own husband even though she loves him with all her heart.

13th-14th mistake - She's hurts so much and decided to leave him because of one thing.
The right way: She was hurt so much that she decided to leave him because of one thing.

14th-19th mistake - Merciless, Cold-hearted person abused his own wife without mercy.
The right way: A Merciless and Cold-hearted guy who abused his own wife without any mercy.

20th-25th mistake - He blamed her for everything in fact it's his own faults.
The right way: He blamed her for everything, even if the fault is done by him.

26th-31st mistake - But the twist come when he truly regretted about what have he done to his EX-WIFE (HJ) he had been searching for her almost 3 years.
The right way: But the twist came when he truly regretted about what he had done to his ex-wife. He's been searching for her for almost three years.

So for the plot when I read it, it got me like: (WARNING THIS MAY CAUSE EXTREME SARCASM AND RUDENESS (I'm really sorry I could not refrain myself from doing so)) Thank you for exposing your whole plot! Now I know what will happen! I don't even need to read the story! Yay!  Ooh, are those character charts! I always loved them! Most authors reveal important information that will appear later in the story which makes the story more unpredictable like "~~~~ Kim: she's a fat girl who will get thin and will also get a lot of fanboys and she will fall in love with the hot kingka Kai and Kai will fall for her and they live happily ever after" so original! Hooray for character charts! 

I noticed that you like the word abuse a lot and like getting your plot too predictable. The only question that is remained unanswered is: Why can't he see her? Basically, I got all the answers I need just by reading your foreword. But then again, Heaven being the title, I guess I can think of a situation why he can't see her.

What I recommend: You need a beta reader. Seriously. 
Notes: I'm sorry if I came out as rude and /coughs/ sarcastic, I'm someone that will leave a story if I stop one obvious mistake. I'm just trying to help! Hope you improve! Bye and have a nice day! Oh yeah and Merry Christmas! :)

p.s. I tried commenting on your story but the review won't post because it exceeded 2000 characters so I created a blog post!