Yoosung is a young college student who ends up getting in the middle of the tension between two brothers, one in which he does not know. Saeran, the brother of Seven, (Saeyoung) is disgusted by how easily his brother moved on with his life, how easily he has made new friends and forgot that his brother was perishing with his so called mother. When he can't get to Seven after all these years, Saeran takes his wrath out on Yoosung, thinking that because of his naïve and innocent nature, he would be an easy target. Yoosung despises Saeran for a good amunt of time, but is reminded that he's human too. When Yoosung stops fighting back and tries to break into Saeran's walls, Saeran tries and hurts him worse. To which Yoosung replies..."You can hurt me all you want....but I know that I can fix you back to who you were..."