Age : 16 years old.

class : 1-2

Favorite things : working hard.

Cho Kyuhyun is a smart and athletic student from a poor family,he is the president of the student council in Yumkwang High School,but despit being a boy he hates the boys very much because his father ran away when he was young leaving them with debtors . he has a young sister ( Seohyun ) who is 2 years younger than him and he works in a host cafe ( that's a secret ) .

Age : 17 years old.

class : 2-2.

Favorite things : watching kyuhyun .

Choi Siwon is the most popular boy in Yumkwang High School , has many talents. he give little attention to everything and doesn't care about the others but that changed when he meet Kyuhyun , he became curious about his life always protecting him from the boys. he refuse all the girls confession that's why Kyuhyun hate him. no one know anything about his family or his background.

Age : 16 years old.

class : 3-2.

Favorite things : arrange and clean the student council.

kim Ryewook is the Vice president of the student council , he is a shy boy , has a crush on Yesung kyuhyun friend but he is too shy to confess his love , always try to help Kyuhyun.

Age : 16 years old.

class : 1-2 ( the same class as kyuhyun ) .

Favorite things : hang out with Kyuhyun and yesung .

lee Donghae is a childish boy , he is kyuhyun childhood friend along with Yesung , know why Kyuhyun hate boys . he care for Kyuhyun very much . has a crush on the dance club president Eunhyuk.

Age : 16 years old .

class : 1-2 ( the same class as kyuhyun ) .

Favorite things : avoid donghae .

Kim Jong Woon also known as Yesung is kyuhyun and donghae childhood friend , he is a strange and calm boy unlike donghae, like to avoid donghae because of his childish behavior but he take care of him and kyuhyun . has a crush on the Vice president of the student council Ryewook.

Age : 30 years old .

Favorite things : take care of the cafe and make new clothes to the workers.

Kim Teayeon is the mangeress of Cafe Latte , she is childish and immature despite her age but she treat Kyuhyun and the other workers like her family.

Age : 16 years old .

class : 5-2  .

Favorite things : break the rules.

lee taemin , kim kibum known as key and Choi Minho '  from left to right ' are the troublesome students who always break the rules and make kyuhyun angry . they hate kyuhyun very much but that changed when they saw him in the host clothes and discovered his secret.

Age : 17 years old .

class : 3-2  .

Favorite things : Dancing .

Lee Hyukjea also know as Eunhyuk is the president of the dance club , has a crush on Donghae.

Park Jung Soo known as leeteuk is Kyuhyun co-worker , he love teayeon but afraid of confessing to her.

Seo Joo Hyun known as Seohyun is kyuhyun little sister , she is innocent  and calm girl , sometimes kyuhyun find her strange. she always participate in charitable contests to help her family and win different things and she is smart like her brother .