Nana has never thought that she would date with the guy she hates the most: Kai. She was forced to be his girlfriend and she had to agree to it since she got threatened by him. They had been obviously loathing each other and it was known by everyone in their school. Pretending to be a couple in front of all those people?! Well it wont be an easy act for them, first they need to convince their friends and then all of the students in their school. Both of them will face difficuities while acting like a real couple to convince people. The real relationships are already hard to go through with but the fake one will be harder for Nana and Kai who hates each other mutually. They will argue or fight for sure but will they learn to stand each other? Will they be able to get along as they get to know each other? Will they be able to be at least friends? Is it even possible for them to fall for each other? Or will they stay as enemies forever? We will see how their twisted and complicated relationship progress as the story unfolds...

Nana(senior in high school,18):

A cool, smart, very beautiful and strong girl, she does not like to depend on others, she protects what she believes,She is very much loved by her friends but other people see her as an arrogant girl. she is 168 cm tall, she has long light brown hair and brown eyes, She has a beautiful athletic body, She is co-captain of her school handball team. She really likes anything related to sport. Unlike majority of girls, she is interested in football, she loves watching football matches and her idols are always football players:) On the second year of high school, she transferred to her current high school since she had argued with her teachers(of course she could not stand the teachers being unfair) and her family decided to transfer her to another school. She had a great 2nd year at her new high school she gained lots of friends and of course some enemies. But everything changed at 2nd semester of her 3rd year in high   school. A guy named Kai transferred to her school. She disgusted him. She was one of the few people who could stand up to Kai and his group They always argued with each other. She could not stand his ways and always stood up to him. However that caused her so much trouble since his friends always cornered Nana or her friends. She is the best friend of the second strongest boy in their school, Taemin. Taemin and his friends always protected her but whenever they are not around she is a prey for Kai's group. Kai personally did not do much to her. But when Nana slapped or hit him(yeah she did it once), he hurted her too.  Even though she hated him so much, she had to become her fake girlfriend because of something. and Her 4th year of high school life started as a nightmare. Her mother is a lawyer, father is a business man and her sister(21) is a med student.

Kai(senior in high school,18):

A cool, arrogant, smart, strong, handsome boy. He is 183 cm and he has athletic body. He has a bit messy dark brown hair and he has hazel eyes.  He likes to protect what he believes too. He is cold towards to the people other than his friends. He has an older sister and little sister. His father and mother divorced when he was 2 years old. Her mother remarried with another man and Kai's little sister is from that marriage. Kai's father is CEO of one of the top companies in Korea. He loves football and he is member of football team. He is exactly the type of a boy that Nana would like(cool,  athletic, tall, a bit macho, footballer) He had to transfer schools, because there had been a big fight in his school which is started between him and his school leader. He defeated him. But that fight caused a chaos in his school and the fight could only be stopped by police. Since his father heard about this fight, he got really angry and transferred him to SM academy on his 3^rd year. Since his previous school leaderhates him and wants revenge, he needs to gain lots of comrades from his new school. He managed to gain the control of SM academy with the help of his best friend, Sehun. who also transferred with him. After defeating the gang leaderof the school who is 4th year student, he became the new leader. This caused in dividing to people into 2 sides. One side support Kahn the other side support Taemin, who was the 3rd year leader. Taemin did not care Kai becoming the leader of the school. This made things easier for Kai. Kai was always ready for a fight with him, but it never happened. Taemin was not much of a hassle but his (according to him), Nana was a big problem. She always confronted him. Even though he does not want to hit girls, he really tried so hard not to hit her. He always seeked other ways to deal with her and finally that blissful day came. One of his comrades saw her beating up some girls and he recorded it. Kai had known the story of Nana transferring SM school and he knew that this cam record would cause so much trouble for her. Just to restrain her, to annoy her and the top of that to get rid of annoying fan girls, he got up with an brilliant idea. He threatened her to become his girlfriend by using that cam record. She was totally angry but she had to agree with that because she was scared of the fact that he could show that record to her parents and school principal.

Lizzy:

 One of Nana’s close friends. She is considered to be the most beautiful girl in the school. Even though she is a beauty, she is neither arrogant nor cocky and she does not care people great attention on her. She is really a nice girl but not an easygoing girl. She does not trust people easily since lots of fake girls tried to befriend her just because she is popular for her looks. She does not like people only favoring outer appearance. She has her own friend cycle which also includes Nana. When she first Nana, she kinda disliked her because she was a bit harsh and arrogant. She got to know her better after they became roommates. They became really close and she understood that Nana is such a nice and friendly girl after you got to know her. She was the only one(aside from Sehun) know that Nana and Kai’s relationship is a fake one in the beginning. She always feels disgusted about this idea since she hates Kai so much. But her feelings for his friend, Sehun..Even though she does not wanna admit, there is something about him making her suspicious about her feelings for him. And after one semester, everyone realized that Sehun is different towards her and there started rumors about him liking her. She never thought that he actually likes her and she still thinks that everyone is misinterpreting his behaviors.  He actually never said something about her or those rumors. She is convincing herself that because of the rumors, she became aware of him and it definitely does not mean that she feels something towards him.

Kim Yoo Jin aka Uee:

 A man eater, she likes playing around with boys. She gets whoever she wants. She is totally gorgeous, y girl. She has a hot body that all the boys could want. She uses it very well. She is known as a but she does not care about it. She believes that she has the right to choose and get whoever she wants. She has never fallen in love and she wants to fall in love but she has not found somebody to care. People find Uee and Nana’s friendship weird because one is a and the other is a tomboy. Actually Nana hates ty type of girls but the moment she has gotten to know Uee, she liked her confidence about men. Nana liked the idea that a girl playing boys’ hearts since she always seen boys breaking girls’ hearts. Nana and Lizzy take advices about relationships from her because she is an expert in this area.

Sehun:

Kai’s best friend. They have been close friends since their childhood. They always back up each other. Sehun is a really nice and handsome guy. In contrast to Kai, he has an outgoing personality. He cares about the people he is close to. He has a cousin, Minzy who is also going to SM academy. Kai, him and Minzy are like a long time trio. Sehun does not like girls who are all show off. He noticed a very beautiful girl. At first he thought that she would be a ty arrogant but on the contrary she is not. He has taken a liking to her. And the girl is none other than Lizzy. He started to show some interest to her, just then the rumors have started. He is also a football player.  He didnot like Nana at first but then they started to become good friends.

Minzy:

Sehun’s cousin, 1 year younger than them. She is really a nice and easygoing girl. She can befriend people really easily. She is loved by so many people and she has lots of friends. Mizy is also really close to Kai since they have known each other for a long time.After she got introduced to Nana, she liked her so much. She is the biggest supporter of Kai and Nana’s relationship. 

Taemin:

 Nana’s best male friend. Taemin is a handsome, athletic and cool guy. He has a soft side for the ones he cares. He is an angel in girls’ eyes. Because he is good at fighting sports, he had been seen as soon-to-be leader of the school. However, he has no interest of becoming leader. When he started high school, he had intention of becoming leader. He was 1^st year and 2^nd year leader but after his girlfriend broke up with him, all of these seemed non-important. He loved his ex girlfriend Naeun so much that he has not gotten over her yet. He had so much pride back then that he didnot even ask her to talk about this breaking up propoerly. He thought if she wanted to breakup then let her do. He regretted a bit because he realized he was a jerk back then. He has changed in a good way. Nana always appreciated him changing his mind and she always supported the idea that becoming a school gang leader is something an empty brained could do. Taemin learned the reason from other people why Naeun broke up with her. She believed the rumors Taemin hooking up with girls. Taemin got so angry after he learned this and he disappointed in her that she never asked to his face if this is true. Taemin never cheated on her but he didnot tell her this because she never asked.  Taemin has always been Nana’s side when she was struggling with Kai’s gang. Even though he does not care becoming a gang leader, lots of people want him to be the school leader. He has lots of supporters and followers who are always supporting and backing up him against Kai’s group. He has never found Kai’s way of doing things, he tried to ignore it but every time they meddled with his friends he could not let it go. He is the only person who may finish Kai off, but he does not want to return his old days when he was a bit like Kai. Therefore, he is losing supporters day by day. People want a leader who is strong and fearless who can protect the school from other school gangs, so Kai has been gaining lots of followers.

Chanyeol:

One of the close friends of Kai and Sehun. He is the biggest supporter of Kai being the leader. He hates Nana and he is the biggest troublemaker for her. He has no mercy towards her and her friends. He always try to find a way to annoy the hell out of her. He also likes troubling Sulli and he know it is one of the ways to annoy Nana. He is going out with a beautiful girl,Kristal. 

Sulli:

One of Nana's close friends in school. She is a really nice and quiet girl. She is always bullied by Chanyeol. She is always protected by Nana against him.

Kristal :

A cool and calm girl. She is a beauty. She has no offence towards Nana and her friends. She doesnot approve Chanyeol's bad guy attidute towards them. She is good friends with Kai, Sehun and Minzy.

Naeun: 

Taemin's ex-girlfriend. She is a cute and nice girl. She is Nana's friend from Nana's previous highschool.  When Taemin was a gangster type of guy,she couldnot stand the way he is solving problems. He also didnot care much about her. They always argued over everything. There were also rumors Taemin was hooking up with some girls in the club. She was so angry that she didnot even ask him if this was true or not. She didnot want to continue the relationship eventhough she loved him so much. Taemin got so angry at her because she didnot ask his opinions about breaking up.