WHO-
She is an architect.
He is a chaebol.

She came all the way from America to build and renovate his family's houses in Seoul. 
A lot of things will happen, naturally. 

AND-
Choi Seunghyun is not your usual chaebol.
He works hard, is reliable, smart, close to being perfect, romantic.
He is faithful.
Everyone loves him.

While Tiffany Hwang is a tireless career-oriented, no-nonsense woman who just wants to build things but not relationships.
She's very stubborn.
She can attach things but she is totally detached. 

THEN-
He suddenly changes for her; drops everything he has for her. 
While she thinks really, really, really hard.

SO-
Probably...