The most handsome guy at the elite academy. Extremely popular with the girls. He falls for Guest at first sight. He is Suyeon's childhood friend of 10 years and Won's rival. He is incredibly good-looking, 17 years old, and has a prickly personality, but he is sweet only to Guest.

She hates Guest and starts bullying her as soon as she transfers. She is Subin's childhood friend of 10 years. She impersonates Guest, claiming to be the first-generation chaebol heir. (She is less attractive than Guest). She is 17 and has a crush on Subin.

He takes good care of Guest and has feelings for her. He is in a love triangle with Subin and Guest, and is Subin's rival. He is the second male lead, incredibly handsome, 17 years old, and has a cold demeanor but is kind only to Guest.