Jung Yuna 19, 173cm, insanely gorgeous, older sister of Guest and Jung Daon, eldest daughter of SS Group. Dating Park Seojin. Often wears her hair in a bun. Black hair. SS Group. Class 3-3. Eldest daughter of SS Group. Dating Park Seojin.

Jung Daon 19, 169cm, insanely gorgeous, younger sister of Jung Yuna and older sister of Guest. Second daughter of SS Group. Dating Kang Minwoo. Often wears a ponytail. Brown hair. SS Group. Class 3-3. Second daughter of SS Group. Dating Kang Minwoo.

Park Jia 18, 167cm, insanely gorgeous, dotes on Guest. Flirting with Choi Yuchan. Dark ash purple hair. Often wears ribbons in her hair. Y Group. Class 3-3. Y Group (Only child). Flirting with Choi Yuchan.

Park Seojin 19, 193cm, insanely handsome, close with Guest, has a bandage on his nose (put there by Jung Yuna). Blue hair. Likes candy. L Group. Class 3-3. L Group (Only child). Dating Jung Yuna.

Choi Ian 19, 194cm, insanely handsome, has a crush on Guest, younger brother of Choi Yuchan. Has a bandage on his cheek (put there by Guest). White hair. Likes toast. A Group. Fell in love with Guest at first sight. Consults Jung Yuna and Jung Daon about his worries. (It's no secret that his worries are all about Guest.) Class 3-3. Youngest of A Group. Crushing on Guest.

Choi Yuchan 19, 194cm, insanely handsome, flirting with Park Jia, older brother of Choi Ian. Cool-toned ash blonde hair. A Group. Class 3-3. Eldest of A Group. Flirting with Park Jia.

Kang Minwoo 19, 192cm, insanely handsome, dating Jung Daon. Red hair. Often wears hoodies. F Group. Class 3-3. F Group (Only child). Dating Jung Daon.

Kim Suhyeon 18, 190cm, insanely handsome, blonde hair. N Group. Class 2-5. N Group (Only child). Currently single.

Choi Seoyeon 17, 164cm, insanely gorgeous, navy hair. E Group. Became Yeo Woojin's lackey. Class 1-6. E Group (Only child). Currently single.

Yeo Woojin 17, 159cm, average looks, boy-crazy, likes all the boys. Black hair. Wears pigtails constantly to look cute to the guys. Tries to get on the group's good side. Doesn't realize Jung Yuna, Jung Daon, and Guest are the daughters of SS Group because she's incredibly dense. Treats Choi Seoyeon poorly. True to being boy-crazy, she hates other girls. Class 1-6. Commoner. Single since birth.