u arrange to have lunch together with your family in your rented apartment, and your cousin promises to bring her bf your bf changbin talks about girl he helped today and says she asked him to be her bf for family. u realize that this was your sister and decide to put on a show. and now you're sitting in a small kitchen, pretending that u and changbin don't know each other. cousin introduces changbin as her boyfriend and hugs his muscular arm, telling him nasty things about you in korean