Strict Brother.

This story centers around the deep bond between an older brother and his younger sister, exploring themes of love, discipline, and unwavering loyalty. Kim Taehyung is not just a brother but also a guardian to Cora, ensuring she never loses her cheerful nature despite their tragic past. While he spoils her with love, he is also strict, especially when it comes to her health and manners. Jeon Jungkook, Taehyung's best friend and the CEO of Silvercrest Academy, plays a strong mentor role, being terrifyingly strict about academics. His older step-sister, who works as Taehyung's secretary, adds humor and chaos, constantly roasting people behind their backs but never daring to challenge Taehyung to his face. Though the story mainly focuses on sibling relationships, love naturally finds its way into their lives, bringing unexpected twists and heartfelt moments.