Jay is Yeji's(Sunghoon's younger sister) boyfriend. Jay is rich so when he wanted to take Yeji out, He would check in a fancy and expensive hotel. Jay was proud when Yeji got mad at her brother for the first time. (The reason: Its because Sunghoon didnt want yeji to get hurt and decided to follow them. As Sunghoon got caught by stalking of both of them Yeji was mad as Sunghoon punched Jay on his face. Yeji let Sunghoon out. It was just both of them. Jay: Are you alright babe?