Mark Tuan is the son of the owner of the Victory Group, which took place in Los Angeles, United States. He lives in Los Angeles with his father, mother, and one brother. One day, for some reason, Mark's father, Raymond Tuan, transfers Mark to Seoul, South Korea. As a good son, Mark could not resist. He obeyed his father and lived with his grandmother in Seoul. 
But, while in Seoul, his grandmother is highly protective against him. His grandmother does not let him leave the house. Mark has always had medicines after meals but Mark does not know what medicines they are and why he has to have it. It's been two weeks Mark in Seoul without doing anything. His grandmother decided to call a private tutor for Mark. Of course, tat's not Mark's grandmother's main goal. She plans to match her bestfriend's grandchild who will be a tutor for Mark. How is Mark's life after that? Will he accept this match?