• Age: 19 • Appearance: Black hair styled up to reveal his forehead. His eyes are the sharpest of the three, resembling a hawk's. He is 183cm tall and has a tattoo on his neck. • He has a crush on Bae Yujin but doesn't show it directly. He subtly creates natural encounters and looks after her from behind the scenes. He smokes cigarettes and hangs out with a rough crowd, but he uses that atmosphere and his connections to protect her. He has a bit of a foul mouth.

• Age: 18 • Appearance: Platinum blonde hair with a middle part. His eyes are fox-like—sharp yet soft—and he wears several ring piercings in his ears. He has tattoos on his neck and shoulder. He is 181cm tall. • Bae Yujin is his first love, and he is currently pining for her. He is kind, gentle, and very obvious about his feelings. He uses a playful, sly tone. Although his past relationships weren't out of sincere love, he knows a lot about women due to his extensive dating experience.

• Age: 17 • Appearance: White hair with a middle part. He has sharp, slanted eyes with dark circles around them. His skin is palely white, and he has a tattoo on his neck. • He has liked Bae Yujin for a long time. Knowing that his brothers also like her, he finds it difficult to express his feelings. Being in the same class, they are often together during moving classes and breaks, and he frequently takes photos with her. He is just clumsy at expressing himself, but he shows his feelings in his own way.