Jung Hyemi #18years old.
" Hi. I'm Jung Hyemi. Nickname ? I have one. 'Gwomul' . It means 'Monster' . It was given by a big monster ! By the way, I'm just an ordinary girl . And I'm so simple. Nope, too simple.I like pink colour even I'm a bit boyish. Yes, I'm a bit boyish ! I'm friendly . I'm not easy explode when someone make me angry. But I will angry when i'm not in mood and someone make me angry. I like to smile. Always ! I have a big laughter . Hihi~ I have a lot of girl friend. But, I haven't a boy friend. I always run away if there only boys around me. I don't why~ One day , a pretty boy who was new student transfers to my school. How chaosed when all students know that the boy was same class with me and he was my seat mate. I never talked to him . But , it was a fate ! I and him now were best friend. " -Monster.

                                                                                                              Jung Hyeri #18years old
" Hi. I'm Jung Hyeri . Everyone in here must be misunderstanding that I'm Jung Hyemi's twin . Right ? Heheh. I'm not. I'm just her cousin. Still have a relationship. I'm elder 2 month than her, but she treat me like I'm her 'saeng'. About nickname ? My best friend call me as horse. Why ? Secret ! Hihi-- I'm friendly . I always want to be friend with anyone. Boys or girls. I like to have new friends. About the boys who Hyemi call as big monster ? I have like him once . And till now.I , Hyemi and him were so close. But he never know about my feeling to him. " - Horse

Xi Luhan #18years old.
" Hi ! Annyeonghaseo ! Ni hao ! Konichiwa ! I'm Xi Luhan. I'm handsome , right ? Every girl who know me say that. Hehe. But , except this girl ! Monster is her nickname. I give her that nickname because he always grouse and her attitude is like a monster ! Forget about her first. Let's talk about me only here. Hurm-- I'm tranfers to new school and now I'm in the same class as Hyemi. And I'm her seat mate . Eh ? About her again ? Aiissh ! Change topics again. My nickname ? Big Monster is giving by Hyemi. Revenge ~ Actually , I'm the big playboy in my school. If I can, I want all girl be my girlfriend (?) Haha ! Except for Hyemi ! I can't hurt her because she is my best-friend. No one know about my truth feeling. " -Big Monster.

                                                                                                                Oh SooJin #19years old 
" Hello. I'm Soojin. Oh Soojin. I'm the big player in my school before. I'm the captain of rugby team in my school. Many girl in my school have date with me. But after that, I just reject them. Well~ player ! But-- Suddenly, I arrange a date with Hyemi, the boyish girl in my school. He never have a boy friend before. So, my friends bet me to date with her. Huh. Who know ? It is a fate when I'm in love with her. But it seems like she not love me. But she love someone else~ How hurt I am. But I'm still by her side. Many hard time that we both passed together. What if she know about the bet ? But-- I'm not by her side because of the bet anymore ! I hate Luhan ! Why ? She make Hyemi cry and make Hyeri almost hurt herself ! I hate that man . Forever~ " -Oh Crush.