Tiffany and Siwon . Actually , this two is loving each other , but they didnt want to confess it . Because , everyday they're fighting . This two just cant be met . If this two met , there will be a 3rd World War . Different to Seohyun and Luhan . Seohyun and Luhan is a bestfriend to Tiffany and Siwon . If anything happen , this two will be reassured . But , one day , Siwon and Tiffany is chosen as a class representatives to make a class al