Gender: Female Age: 17 (10th Grade) Nickname: Red Birthday: Nov 7 Affiliation: Sesan High School Traits: Dating Su-hyeong; childhood friends with Ja-un. Likes: Freedom, meeting new people or having new experiences, dancing, and exercise. Dislikes: People with prejudices (stereotypes), being controlled (curfews), and failing to win someone's heart.

Gender: Male Age: 17 (10th Grade) Nickname: Black Birthday: June 14 Affiliation: Sesan High School Traits: Fraternal twin of Je-hyeon. Likes: Cute things, peach jelly, adventure. Dislikes: Whiny people (though okay if it's only once or twice, or a special situation), the cold, and giving comfort (struggles because he's very clumsy at it).

Gender: Female Age: 17 (10th Grade) Nickname: Yellow, Big Eyes (Hyun-min's exclusive nickname for her) Birthday: May 27 Affiliation: Sesan High School Traits: Called "Big Eyes" because of her large eyes. Likes: High grades, decorating her diary, cute pajamas and bedding. Dislikes: People who interfere to the point of being a nuisance, overly active things, standing out for no reason.

Gender: Male Age: 17 (10th Grade) Nickname: Green Birthday: Oct 4 Affiliation: Sesan High School Traits: Has two older sisters. Very diligent. (???) Likes: Spicy food, experiencing new things. Dislikes: Receiving too much attention (can't handle it), feeling neglected, being a nuisance.

Gender: Male Age: 17 (10th Grade) Nickname: Blue Birthday: Sept 18 Affiliation: Sesan High School Traits: Dating Yuhwa. Has a younger sister named Kang Su-jeong. Likes: Sweet food (candy), staying within familiar groups, taking walks. Dislikes: People who ruin the mood and then act proud of it (Hong-yeon gets a pass because she's a friend!!), becoming depressed, and when Hyun-min and Ji-san petty-mindedly team up just to tease him.

Gender: Female Age: 17 (10th Grade) Nickname: Pink Birthday: April 1 Affiliation: Sesan High School Traits: Loves cats. Likes: Tuna, receiving attention, clothes (fashion). Dislikes: People with no opinions of their own, pigeons, being pitied.

Gender: Male Age: 17 (10th Grade) Nickname: Purple Birthday: Feb 16 Affiliation: Sesan High School Traits: Childhood friends with Yuhwa. Likes: Piercings, chocolate balls, rest time after achieving a goal. Dislikes: Aggressive people, violence against the weak, being called at dawn for non-emergencies (especially by Song Da-rae).

Gender: Female Age: 17 (10th Grade) Nickname: Brown, Maroon Birthday: Dec 6 Affiliation: Sesan High School Traits: You could say she's quite an introvert...? Likes: Building up effort and being recognized, baking, having Da-rae speak for her. Dislikes: People who make assumptions without knowing the facts, breaking rules and inconveniencing others, becoming useless.

Gender: Female Age: 17 (10th Grade) Nickname: Lime Birthday: Nov 21 Affiliation: Sesan High School Likes: Winning competitions, dating, nail art. Dislikes: People who hurt those close to her, being controlled (curfews), speaking in circles.

Gender: Male Age: 17 (10th Grade) Nickname: White, Gemini Birthday: June 14 Affiliation: Sesan High School Traits: Fraternal twin of Hyun-min. Likes: Coffee, music, quiet environments. Dislikes: Adults who shout loudly, forming relationships with strangers, unread messages and accumulating notifications (must check and clear them immediately).