She tried to keep calm and focused on what's happening. 

First: She was murdered by her best friend. no ex-best friend.

Second: She was reborn.

Third: She was time travelled or her soul time travelled to the future. 

Fourth: Her soul transmigrated to another person body.

'Oh my god, I studied these reborn stories only in novels' She thought to herself when the realization hit her.

Those reborn stories are mostly how the female lead take revenge on her enemies. She just thought those were fiction.

Wait, then fairies are real?

What about Vampires? Werewolves?

Then Peter Pan also real?

She slapped herself for her stupidity.

But seriously speaking what happened to the owner of the body?

She closed her eyes and tried to recollect the memories of 'Sarang'

Sarang, 18 years old. She's currently living with her father and elder brother. Sarang mother passed away when she was three years old. 

So she was spoiled by her father a lot and dotted by her elder brother as well. Sarang was the apple of the eye in the family.

Sarang's father is one of the richest man in the country. 

Sarang was engaged at the age of eight with a boy named Kang Hwan. His family also one of the richest family in the country.

Both of their fathers were childhood friends so they wanted their children to get married when they grow up.

Sad truth was Sarang was so into him but he's not.

In fact, Kang Hwan didn't show any interest on her. Sarang always followed Kang Hwan wherever he goes which Kang Hwan didn't even like it.

Kang Hwan was so popular in school because of his looks and wealth. Sarang behaviour made his so called fangirls angry even though they know both Kang Hwan and Sarang were engaged. It infuriates them a lot so they started to bully her. Often Sarang has bruise on her body.

The fangirls are very clever they never once hit her face because they don't want to get caught.

Only two of Sarang friends know what's happening with her, Byeol and Ga Eun. They were with Sarang from the kindergarten.

Whenever Sarang gets in trouble Byeol and Ga Eun would come for her rescue.

So many times they told Sarang to give up on Kang Hwan because they know he doesn't like her. But Sarang said she will wait until he open his heart for her.

After all he didn't dated any girl. It gave some hope for her.

Sarang hope was broken on the high school graduation day. 

Sarang waited to give graduation flowers to Kang Hwan. She waited for a long time but she couldn't able to reach him. So she said to Byeol and Ga Eun that she's going to look for him. When they insisted to go with her, Sarang declined their offer, she doesn't want to waste their important day for her.

Sarang started to walk towards the school field where Kang Hwan likes to rest often. 

Finally she found him. Sarang smiled and walked towards him. His back faced towards her so he didn't noticed Sarang. Once she got closer to him she finds that he was not alone. Kang Hwan was with a girl who bullied Sarang.

That didn't broke her, but what broke her what she heard next.

"What if your parents force you to marry Sarang?" She asked him.

"I will run away where no one can find me" Kang Hwan chuckled.

"You should have asked Sarang to break off the engagement first. So that you don't have to run away" She giggled.

"Don't you know about her? How clingy she is. It's so annoying to the extinct that I never wanted to see her again. So I decided to study abroad, hoping to never see her rest for the of my life" Kang Hwan throw the flower to the ground which was given by his fangirls.

"I don't know you hate Sarang this much. You're so cool and handsome. That's why I like you" with that she kissed him.

Sarang was broken by seeing her first love of ten years kissing another girl. Sarang ran away wherever her legs took her.

Sarang had a little bit of hope that Kang Hwan will accept her love for him. Today she realised that she was living in an illusion. To hid from her he even wanted to leave the country. Sarang didn't realise until now how much hatred Kang Hwan had towards her. All the love she showed him was annoying in his eyes.

Sarang doesn't want to live anymore, she wants end her pathetic life which she wasted on the person who hates her. 

Sarang went to the chemistry lab which was usually locked but to her surprise it was opened. She entered into the lab, saw no one was there other than her. She mixed some chemicals into the tube.

Sarang knew the chemical in her hand was poisonous. Sarang learned that once in her chemistry class. Sarang had a bitter smile on her face by thinking about not forgetting the chemical substance which she studies for her test.

Other than Kang Hwan she loved science. Aside from marrying Kang Hwan, one of her dream is to become a scientist. but she always get last rank in her class. Everyone thought she will not graduate this year because of her marks but miraculously she pssed in her final exam. Even though she was willing to give up on her dreams as she decided to live as Kang Hwan's wife.

But she didn't expect that one of her dream will be helpful to end her life. 

Sarang closed her eyes and recalled her ten years of pathetic life. She quickly drank the strange liquid in the tube and fainted.

She opened her eyes and wiped the tears on her cheeks. 

She asked nanny Lee what happened after Sarang fainted in the chemistry lab. 

One of the staff who forgot to bring his thesis came back to the lab to retrieve it. The staff was shocked to see the unconscious student on the floor with foam dripping from her mouth. 

Panicked, he called the ambulance and admitted her to the hospital. Sarang heart was stopped for almost 120 seconds. 

Finally doctor able to revive her but still she didn't regained her conscious for about one week. 

After hearing that she sighed by thinking about this poor girl who was two years younger than her. It would have been better If they both met each other when they both were alive.

'Sarang, you stupid girl. I can feel your pain. Don't worry anymore. Rest in peace. You gave me second chance to live again, you lent me your body to live again. So I will make sure to live the fullest'

She decided to live as 'Sarang' not as 'JinAe'