Yoo Jeongyeon is dating Myoui Mina who knows about his sad past. their relationship is full of love and happinese would it remain like it is when Im nayeon his ex. the girl who broke his heart, appears? would Jeongyeon accept to get back to her? how is Mina going to deal with it? 

Jeongyeon found out about the dating rumor

Jealousy is the unpleasant emotion you feel when think someone's trying to take what's yours   Well that's just how myoui mina feels 

Jeongyeon asked mina out but with mark, her best friend, both didn't know that the black swan is jeongyeon's secret crush & vices versa.I   will she give up on mina or fight for her ?  

Jeongyeon got back home from work after a tiring day just to get her girlfriend ignoring her which led her to become frustrated, suddenly an idea came to her mind to get her attention back, will she success?

Yoo jungyeon and Im nayeon are a happy couple with a six years relationship, they love each other or that what jungyeon thought. His heart broke into million pieces when he received a marriage invitation card with the name of Im nayeon & Park Chan Yeol He meet a girl named Chou tzuyu who had her eyes on him not a long time ago She ask him for a date, he

  Yoo jungyeon is Yeungjin High School student in daegu , a player who is famous with her prettiness  and handsomeness in the same time, have many fangirls and fanboys but mostly girls , fails her final exam , Eager to get a degree she beg her  professor to give her two more marks  the latter accept to give

yoon bomi a nerdy high school student learns that his girlfriend park chorong cheated on him  and played with his feelings,,

charcters: Ham eunjung:  pouplar girl in school (no.1)