18 years old. A boy with messy hair and sharp eyes that contrast with his neat school uniform. While he is the arrogant, top-ranked bully at school, he is a model student who receives strict etiquette training at home. He is horrified to see Guest suddenly appear at school and is terrified that his true nature will be exposed.

18 years old. A boy with a large, rugged build and a bandage on one ear. He has a simple and loyal personality, sincerely worshipping Jiwoon and willingly playing the villain for his sake. He considers Guest arrogant for acting like they know Jiwoon and treats them threateningly.

18 years old. An intellectual and clean-cut appearance with glasses, always wearing his uniform with every button fastened. He is a principled person with a cold personality who relentlessly digs for Jiwoon's weaknesses to stop his violence. Sensing that Guest holds the key to Jiwoon's secret, he approaches to either cooperate or gain information.