Soohyun want Seohyun to forget her past, and be a new Seohyun. changed her name from Seo JooHyun to Lee Seohyun, take Mr.Lee and Auntie lee as her parents. And He'll take her to Seoul to start his planned. 
Soohyun only take Seohyun as someone he use for complete her planned, Seohyun know it but she's okay as long as Soohyun will help her.

Next week, Soohyun take Seohyun to Seoul. He let her live in a hotel first, then he go to his home.

"Ding dong~"

"Yes, who is that?" a lady came out.

"Open the door, I'm Kim Soohyun." He said.

"Kim Soohyun? Who is that?" Lady said.

"Just open the door." Soohyun start frustated.

"But I won't let a stranger in." Lady said again, Soohyun stare at her.

This time, Taehyung came out and saw Soohyun. He was shock then happy to see his brother, 
"Open the door." he command.

"Okay mister." Lady said.

"Bro! It's been long time no see you." Taehyun said and hug him.

"Yeah my little bro." Soohyun said and hug back.

"Quick come in." Taehyung said, he turn to the lady "Hey you, he is my brother. Remember it." he said. Turn to Soohyun again, "She is your mom's maid, she is so overbearing only hear Auntie words." He said.

Soohyun look around his house, it changed a lot. After that he saw Kai and his mom.

"Bro!" Kai shouted and run to Soohyun, his mom only looked at him then turn away.

Later night, They had dinner together. "So, How's your study there?" His father began speak.

"Already done." Soohyun said.

"So why you came back here again?" His mom said.

"I just want to come back, no excuse." He answer motionless.

After they finished the dinner, as usually they go to their own room. Soohyun go to his room and was clean it up, suddenly Taehyun come.

"Bro, are you finished? can I come in?" he ask.

"sure, come in." He said.

"I have a lot of thing to tell you." Taehyung said,

"What? I think there is so many thing change." Soohyun said.

"Correct! you know we had a new mom again *smirked* Lee Hyori her name, she was a young lady. But not an ordinary girl, she brave to fight with