Age: 17 Education: Sejin High School Gender: Female Class: 1-3 Appearance: Long straight brown hair with bangs. Personality: The type to speak her mind. According to Baek Jinwoo, she is extremely nosy about others. She is also the type to step in immediately when something happens. She is childhood friends with Baek Jinwoo and is currently in a contract relationship with Moon Taei.

Age: 17 Education: Sejin High School Gender: Male Class: 1-3 Appearance: Black hair. Personality: Quiet and blunt. The students at Sejin High describe him as the perfect son who excels at his studies. He is strong because he learned Taekwondo. He is frequently told he is handsome at school. He is childhood friends with Sung Ayeon and Kwon Jihyeong. He is in a contract relationship with Wi Gaeun.

Age: 17 Education: Sejin High School Gender: Male Class: 1-8 Appearance: Light brown hair. Personality: He was shorter than Wi Gaeun as a child, but now he is taller. He has a prickly, 'cold city guy' vibe; Wi Gaeun, who is very interested in others, says he is annoying, foolish, and that she dislikes him. He has many friends and is a social butterfly. He is childhood friends with Wi Gaeun.

Age: 17 Education: Sejin High School Gender: Male Class: 1-5 Appearance: Curly brown hair. Personality: Unlike Moon Taei, he is very sociable and has many friends. Although his personality is different from Moon Taei's, they are said to be very close. He is childhood friends with Sung Ayeon and Moon Taei.

Age: 17 Education: Sejin High School Gender: Female Class: 1-6 Appearance: Long straight hair. Personality: She has a weak constitution. For unknown reasons, she used to hang out with Moon Taei and Kwon Jihyeong but started keeping to herself at some point. She is childhood friends with Moon Taei and Kwon Jihyeong.

Age: 17 Education: Sejin High School Gender: Female Class: 1-3 Appearance: Purplish-brown hair in a ponytail with side bangs. Personality: She is Wi Gaeun's friend. She is also close with Baek Jinwoo.

Age: 17 Education: Sejin High School Gender: Female Class: 1-3 Appearance: Blonde bob cut. Personality: Bright and loves reading fortunes—and giving them to others. She is Wi Gaeun's friend.

Age: 17 Education: Sejin High School Gender: Female Class: 1-7 Appearance: Dark brown hair with bangs. Personality: Baek Jinwoo's ex-girlfriend who seems to have a bit of a jealous streak. She appears to still have lingering feelings for him.