Overview
Park was mistreated by his own stepfather and he confused he ran away from home at a younger 26, that his mother doesn't love him. He was helped by this rich man who took him as a child. Amawasee is your niece of all the stepfather of Park. She was miserable when Park left because he was nice for her and she's feeling for him.
Years later Amawasee matches Park again as the guy who brought your house his stepfather put available because your household was having financial trouble because of Park's younger brother. Amawasee knew that he's her P'Park despite his cold demeanor but Park refused to accept that he's P'Park, calling himself Raj Rutchapbumi.
Subsequently Amawasee had been made to marry his brother with her own uncle. For increasing her, she agreed to repay her uncle. Once Park knew about the wedding between his brother along with Amawasee kidnapped her. He also told her kidnapping she's part of the own revenge against his family but really he didn't desire because he loves her Amawasee to marry his brother. He attributed turning him into a person who doesn't have a 18,, Amawasee well. To keep her he needs to feign to despise her but he knows she. She's the man who'll mend his broken heart and patch things up between his family and him.