"I will not fall in love with you heartless !"

"Then , do you think I will fall in love with you arrogant ? Keep on dreaming !"

What she talk is not what she feel . What will happen when arrogant girl fall in love with a heartless guy ?

"Maybe i'm not a number one , but I hope i'll be the last one ."

Kai - Name given is Kim Jongin . 17 years old heartless guy . Known as Kai and stay with Park Mina's(you) family since he is 12 years old . His parents died in an tragic accident . He had a sweet girlfriend when he was 9 .  Then , the girl move to Korea on the same date when his parents died . Since that , he do not look so happy . But when he see Mina's sweet smile , he turn to the last 4 years Kim Jongin .

Mina - Park Mina . 16 years old girl . She is a sweet girl but she will turn arrogant when she meet Kai . She don't know why she act like that . It is just like a machine , when meet Kai , Arrogant . When Kai's go , sweet . 

Luhan - Xi Luhan . 17 years old cute guy . Try to be manly when he with Mina but he always fails and that make Mina's love him ㅋㅋㅋ . Kai , Tao , Chen and Suho bestfriend .

Min - Oh Ji Min . 17 years old . Kai's old girlfriend that move to Korea when she was 12 . Social . Playgirl .

Yina - Lee Yina . 16 years old . Mina's bestfriend . Suho's girlfriend . She love to talk and busy body ㅋㅋㅋ

Tao - Park Zi Tao . 17 years old . Mina's brother . Chen twins . Naughty and sweet person . Nobody can deny it -.-

Chen - Park Jong Dae . 17 years old . Mina'a brother . Tao twins . A humble and pretty kind guy . He is not like Tao who is very naughty =_=

Suho - Kim Joon Myun . 17 years old . Yina's boyfriend . He love to sleep in the class .