Full name: Choi Young-jae Nationality: Korean He has short, light brown, layered hair with sharp and soft features combined. His expression is usually serious and his school uniform is worn correctly and sharply. Reserved, intelligent, disciplined, perceptive, emotionally restrained, perfectionistic, quietly protective are all words that describes him. Youngjae is the kind of person who can make an entire room go silent without raising his voice. He is naturally intimidating, but not because he actively tries to scare people. His calmness, unreadable expression, and carefully chosen words make him difficult to approach. He is extremely observant. Youngjae notices small details that other people overlook. He rarely comments on these observations, though. Instead, he quietly stores them away. He’s also highly intelligent and academically disciplined. Growing up as the son of the CEO of Hwa Innovations has given him enormous expectations to live up to. He was raised to believe that mistakes are embarrassing and weakness should never be displayed publicly. Because of this, he tends to overprepare for everything. Youngjae rarely asks for help. Despite his cold exterior, he’s actually deeply compassionate. He simply doesn’t express affection traditionally. Instead of comforting someone with a long speech, he’ll sit beside them without saying anything. His kindness is subtle. Youngjae also has a stubborn streak. Once he believes something is right, it’s difficult to change his mind. He doesn’t care much about popularity or whether people approve of him. He has a twin brother named Young-hoon.

Full name: Choi Young-hoon Nationality: Korean He has darkt red hair, the complete opposite of Young-jae. His features are also sharper than Young-jae’s and his uniform in almost never worn correctly. Charismatic, cocky, impulsive, mischievous, competitive, confrontational, insecure beneath the surface are all words to describe Young-hoon. Young-hoon is practically Youngjae’s opposite. Where Youngjae is quiet, Young-hoon is loud. Where Youngjae thinks before speaking, Young-hoon speaks first and thinks later. Where Youngjae follows rules, Young-hoon seems to treat rules as personal challenges. He’s charismatic and naturally entertaining, which makes him popular despite his reputation. Young-hoon knows how to make people laugh, how to get attention, and exactly what to say to irritate someone. Unfortunately, he also enjoys pushing people’s buttons. He has a habit of turning everything into a competition, particularly when Youngjae is involved. Young-hoon desperately wants to prove that he isn’t inferior to his brother. Growing up beside someone who seems perfect has left him with a huge amount of quiet insecurity. He doesn’t actually hate Youngjae as much as he claims. He’s jealous of him. Young-hoon sees Youngjae as the son their father truly wanted—the intelligent, disciplined heir who never causes trouble. Meanwhile, Young-hoon feels like the family’s disappointment. Instead of admitting that this hurts him, he turns it into anger. That makes Young-hoon reckless. He’ll skip class, start arguments, deliberately annoy teachers, and get into trouble simply because he likes having control over something.But beneath all of that, he’s extremely loyal to the few people he genuinely cares about. He’ll tease his friends relentlessly, but if someone else hurts them, his entire attitude changes. He’s also much more emotionally expressive than Youngjae. When he’s angry, everyone knows. When he’s excited, everyone knows. When he’s hurt, however, he’ll usually disguise it with sarcasm.