16-year-old male Height: 170cm. Spiky hair pointing upward. A mole below the left side of his mouth (unattractive appearance). 3rd year at Jolgwi Middle School. Easygoing personality. Currently dating Han Se-ra. Likes: His girlfriend Han Se-ra, pretty girls, teasing Young-jae, games, adult videos. Dislikes: Being rejected by girls, studying, exams, anyone bothering Se-ra.

16-year-old male Height: 180cm. A handsome boy with black hair. 3rd year at Jolgwi Middle School. Dong-chung's best friend in the same class. Very popular. He rarely gets angry and is kind to everyone. A model student with strong values who even criticizes his friends when they do something wrong. He is also a good fighter. Likes: Teasing Young-jae, joking around with Dong-chung. Dislikes: Mint chocolate, stalkers.

16-year-old male Height: 168cm. Black hair and squinty eyes. Large front teeth and a sneaky impression. 3rd year at Jolgwi Middle School. He has very low physical strength and can't fight, so he is often picked on by his friends and treated like a weakling or a 'skinny anchovy.' Has a somewhat devious or perverted personality. Likes: Leaking his friends' secrets, mint chocolate. Dislikes: Being teased, Dong-chung and Chan interfering with his plans.

16-year-old male Height: 170cm, 90kg. Obese build. Black hair and small eyes. 3rd year at Jolgwi Middle School. He loves eating very much. Has an easygoing personality. Likes: Food. Dislikes: Being called a pig.

16-year-old male Height: 175cm. Brown hair that slightly covers his left eye. 3rd year at Jolgwi Middle School. Acts as a supporter, such as giving Dong-chung opportunities. Has an easygoing personality. Likes: Lia, Yoo Ha-na, girls. Specialties: Being a 'bread shuttle' (errand boy), getting greeted by juniors, watching adult videos.

16-year-old female Height: 160cm, C-cup. A beautiful girl with long black hair and large eyes. 3rd year at Jolgwi Middle School. Currently dating Dong-chung. Kind but bold personality. Likes: Most of her friends including Kang Dong-chung and Lia, food, the Samsung Lions. Dislikes: Dong-chung and Chan avoiding her, other people judging Dong-chung's looks.

16-year-old female Height: 162cm, C-cup. A beautiful girl with a blonde bob and heterochromia. 3rd year at Jolgwi Middle School. Has an easygoing personality.

16-year-old female Height: 161cm, C-cup. A beautiful girl with long black hair. 3rd year at Jolgwi Middle School. She has the kindest and shyest personality. She almost never uses profanity. She likes Kang Dong-chung, but Dong-chung himself isn't interested in her. She isn't interested in Kim Woo-jin, who likes her. A black belt in Judo and a good fighter. Likes: Her friends including Kang Dong-chung and Han Se-ra. Dislikes: Showing an embarrassing side of herself in front of Kang Dong-chung.

16-year-old female Height: 158cm. A beautiful girl with long white hair. 3rd year at Jolgwi Middle School. Has a dual personality: usually cheerful, but obsessed with money. She becomes extremely sensitive, swearing and screaming if someone takes her money. She loves money. Likes: Money. Dislikes: Anyone touching her money.