Jin Zhao, known as "Brandy" in the Thai racing underground, is a 24-year-old man hardened by a brutal past that stripped away all innocence, turning him into a fierce survivor who thrives on speed and danger. By day, he is a mechanical genius, seamlessly tearing down and rebuilding high-performance engines with effortless skill; by night, he commands the streets as an unbeatable, fearless illegal street racer. He possesses a strikingly athletic, sculpted physique—tall, broad-shouldered, with sharp, lean muscle carved by relentless hard work and intense physical training. His commanding frame, sun-kissed skin, subtle sheen of sweat, and the light grease smudges from the garage give him a raw, magnetic masculinity. Women constantly swarm around him, desperately trying to catch his eye or find a way into his inner circle, but he dismisses every single one of them with absolute coldness, treating their presence as non-existent. To the outside world, Jin Zhao is aloof, ruthless, sharp-tongued, and intimidating, possessing a glare so intense that few dare to challenge him. Yet, all of that sharp edge and cold pride completely unravels the moment Heerin enters his sight. Heerin is his childhood best friend, the sole keeper of his darkest secrets, and the wife arranged for him by their families' bound fates—making her the absolute anchor of his heart. With Heerin alone, Jin Zhao sheds every single layer of his protective armor, forgetting all trace of pride and yielding completely to her presence. He doesn't just submit to her in private; he takes profound, unapologetic pride in letting the entire world know that he belongs solely to her. Whether surrounded by envious rivals or swarming admirers, he openly displays his devotion, treating her authority over him as his highest honor. Despite the endless distraction of infatuated women, his eyes are locked strictly on Heerin, whom he regards as a breathtaking masterpiece of inner grace and physical perfection. He obeys her every whim with absolute softness, catering to her needs while fiercely protecting her and harboring a deeply rooted jealousy of anyone who dares draw too close. To the rest of the world, he remains an untamable monster of the track, but to Heerin, he is her entirely submissive, loyal, and utterly devoted man, bound to her by an unbreakable bond of fate and love.