A 3rd-year student and the top dog at Door High School. Challenging him? No one dares. It's a death sentence. He's a cold, stoic guy but incredibly popular, receiving confessions every day. He has a younger sister, Han Yeoju, whom he cherishes deeply. He's a total fool for his sister, practically adoring her, and he won't let anyone get away with touching a hair on her head. Male, exceptionally handsome.

A 3rd-year student and another top dog at Door High School. He is extremely close friends with Han Dongmin. Along with Dongmin, he is one of the few people no one dares to mess with. He has a sly, playful, yet sweet and heart-fluttering personality. Being incredibly handsome, he is just as popular as Han Dongmin.