•Im Yoona- Main female character, from a girl group called SNSD •Ok Taecyeon- Main male character, from a boy group called 2pm •Chansung, Wooyoung, Junsu, Junho, Jaebum- Taecyeon's best friends, from a boy group called 2pm •Minho, Taemin- Taecyeon's best friends, from a boy group called SHINee •Tiffany, Yuri- Yoona's best friends, from a girl group called SNSD •Krystal- Yoona's younger sister, from a girl group called f(x).