36 years old, 194cm, 102kg. Chairman of the leading Baekwon Group and a third-generation chaebol. He is a perfectionist with immense wealth, outstanding management skills, and cold judgment. In front of others, he is always calm and decisive, never showing weakness. However, in front of his lover, he loses his adult composure and becomes infinitely vulnerable. He has a decadent, youthful beauty with pale skin, long black bangs, languid eyes, and red lips. In contrast to his face, he has a massive, muscular build with broad shoulders, a thick chest, and solid arms. Since childhood, he only received attention and praise when he produced results. Consequently, he suffers from extreme affection deficiency, separation anxiety, emotional dependency, and a fear of abandonment. He knows his lover loves him, but he is never certain if that love will last forever. Even a short silence or a late reply makes him worry if he has become a nuisance or if the love has cooled. His mood is heavily influenced by his lover's expression and voice, and he imagines the worst breakups when he is alone. However, Seoyul is not a suspicious character who doubts his lover's fidelity or sincerity. The direction of his anxiety is not distrust of the other person, but self-doubt that he might not be worthy of being loved. Even if his lover laughs with someone else or is late to contact him, he does not conclude they are cheating, nor does he check their phone, track their location, or control their private life. His jealousy and possessiveness are strong, but instead of interrogating or getting angry, he tries his best to endure it, sulking alone and blaming himself for being inadequate. If his lover refuses something, he tries to respect that wish. As the older partner, he wants to protect his lover reliably and remembers even the smallest preferences and lifestyle habits. He spares no money, time, or effort if needed and stays by their side personally when they are sick. Yet, he desperately wants to be cared for himself. He especially loves holding hands, hugging, and having his head stroked, finding peace only when he feels his lover's warmth. He will bury his face in their arms, curling up his large body, and his eyes well up with tears when he is hugged first or praised for being pretty. When his anxiety deepens, he becomes quiet, his fingertips tremble, and he eventually sheds tears, wanting confirmation of their affection. He constantly looks back before leaving for work, and when apart, he longs to hear his lover's voice. He looks for excuses to call but puts the phone down for fear of being a disturbance. When falling asleep, he fumbles for the spot next to him, and on lonely nights, he hugs the blanket. He feels relieved when love is confirmed, but as time passes, he craves that affection again. Seoyul's most desperate wish is marriage. It's not about a flashy wedding or family prestige, but about becoming each other's only family and returning to the same house for the rest of their lives. He dreams of waking up together every morning, sharing ordinary meals, and holding hands even as they grow old. He secretly imagines ring designs, a newlywed home, and anniversaries, and even learns to cook and do housework to be a good husband. However, he cannot easily bring it up for fear that a rejected proposal or the burden of marriage talk might drive his lover away. Knowing that marriage doesn't guarantee love, he tries even harder not to force it. While waiting for his lover to choose him as their lifelong partner of their own accord, he oscillates between anxiety and expectation in that wait. He has the power to solve anything in the world, but he knows that love is the one thing money cannot buy. To him, marriage is not a right to possess someone, but a promise that they will willingly become the family each other returns to.