If I Were You / 거기, 내가 가면 안 돼요?

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I still don't know the ending so up to last chapter I read, I remember
Spoiler: SpoilerSunma manage to escape the Imperials institute Women's Consultation then she met/reunited with Kanghui. They flew to US (for safety). Sunma attended school here in the name of Chaeryoung. I remember this is the arc where there is Spoiler: SpoilerDiscrimanation for being Asian.  Anyway, after Sunma graduated, she (with Kangwhi) went to Habrin (?) China to work as an Army. This is where... ah.. you...know...  

No, Chaeryung married somewhere near the middle of the story (against her will).

I do believe they already appeared in the manhwa when I read it

Clarification:
There is no 'one' MC, both Chaeryung and Sunam are the protagonist.

Yep, she will have a character development in later chapter.

I remember, my mind is still fuzzy, Spoiler: AnswerChaeryung fell inlove and dated Jang-kyu (?) which is an anti-Japanese govern and take part of independence movement (which is crime). So her father made a choice that Sunam will be taking Chaeryung role (as they are just look a like) and Chaeryung got married to Janpei (even it is against her) to escape.

With that, Sunam really didn't pulled anything off to cast out Chaeryung. It was a decision of the father for Chaeryung to escape and let Sunam be Chaeryung. (Which is why Sunam is one who got to the Imperial Institute Women Consultation Unit instead of Chaeryung) 

I haven't read the ending so I still not sure. 

Spoiler: CharactersYoon Chaeryung - Born as the Viscounts Daughter. Her mother hates her because she was born as a girl rather a boy.Sunam - she was born in a poor family. Apparently, she was the one who sold off to Yoon's family instead of a young girl after volunteering. Some people in yoon's household noticed that Sunma look like Chaeryung. She fells in love with Kanghui after giving her a candy when she was sad/crying.Hyungman Yoon - A viscount granded by the governor. He was branded as a traitor in his countryMadam Kwak - Chaeryung's mother. She hates her own child as she was not born as a boy. Apparently, all of her children (except Chaeryung) died before their first birthday.Kim Surinae - Chaeryung's Nanny. She became her nanny at the age of 30 when she breast feed chaeryung because Madam Kwan can't produce milk and the baby doesn't want bottle/cow milk.Noh Tae-sul - Surinae's son, he works in yoon's household. He has feelings for Sunman but got rejected when he confessed.Yoon Kanghui - Chaeyung's (half) older brother and he was the son of Hyunman to his mistress, InaeJangsoo - Kanghui's friend. He (mostly) involve Kanghui in his case when he got arrested by Japanese soldiers.Tarao Junpei - A poor noble who was inlove with Chaeryung.Spoiler: SpoilerSunam will be going to a Imperials institute Women's Consultation unit instead of Chaeryung (I forgot what crime she did) then Chaeryung married Junpei then fleed to US 

What about Sunma?  Is this her ending for real ?! the poor girl  more spoilers please. 

Can someone spoil whether chaeryung have any character development because so far from the manhwa chapters i read, she's kinda awful to sunam lmao.


Also, how did sunam pulled off having chaeryung casted out by her ow father 

Thank you for the Spoilers,  if you find anything else please spoil it.