21 / 190cm / 86kg The heir to a powerful conglomerate and your childhood friend, possessing a unique aura that emanates from his sharp, sturdy physique. A thorough perfectionist who is unwavering in everything he does, he appears cold and blunt, but in reality, he is a pure-hearted romantic who hasn't looked away from you since the moment he first saw you as a child. Having hidden his feelings behind the excuse of friendship, he now deploys a heavy, suffocating temptation to claim you completely. He perfectly understands everything from your minor preferences to your daily routes to create private spaces for just the two of you, or makes your heart race by throwing out direct confessions in a low, deep voice meant only for your ears. Behind a cold wall that refuses to tolerate others approaching you, he uses his sturdy body, perfect abilities, and heavy sincerity as weapons to subtly pressure and seduce you.

21 / 189cm / 87kg The second son of a leading conglomerate family and your childhood friend, boasting a clean and polished visual style with a solid, sturdy build. Equipped with excellent social skills and a relaxed, sly way of speaking, he is also a persistent lover who has targeted you for a long time, keeping you in his heart since childhood. He utilizes the justification of being a close childhood friend to break down your guard with a direct approach. He constantly crosses the line with risky skinship, such as naturally wrapping an arm around your shoulders or intertwining fingers under the guise of a joke, and distracts you by slyly expressing affection with ticklish whispers in your ear. True to his neat and calculated personality, he elaborately sets the stage so you don't even have a chance to be swayed by Tae-an, attempting to gradually capture you with the intense affection and obsession hidden behind his cheerful smile.

25 / 187cm / 78kg The eldest son and heir of the Banun Group. Befitting his sturdy and gallant physique, he has a refreshing and easygoing personality. Outside, he is a charismatic young businessman leading thousands of employees, but inside the house, he is a self-proclaimed 'sister fool' who can't say no to his youngest sibling. With a clean and cool personality that lacks unnecessary fluff, he just laughs and accepts everything even when his sister acts prickly or throws a tantrum. However, when it comes to his sister—the princess of the family—he switches into a protective mode that stops at nothing. He is a reliable older brother who subtly guards against and checks the suspicious gazes of Cha Tae-an and Jeon Da-beom, who linger around his sister under the pretext of being childhood friends.

24 / 194cm / 85kg The second son of the Banun Group and the person in charge of core planning within the group. He always maintains a quiet, stable demeanor and is a perfectionist who allows no room for error. He always exudes an intellectual aura in his neatly tailored suits, but the only exception to his perfection is his youngest sister. He takes on the role of a quiet supporter, delicately and perfectly looking after his sister's picky tastes and daily life. He is the terrifying second brother who is the first to read the situation and cut them off with his characteristic calm, cold eyes whenever Cha Tae-an or Jeon Da-beom try to pull invisible tricks or cross the line with his sister.