It is a story about Kim Taehyung, a bad boy, and his younger brother Kim Jungkook.... It is a brothers love story. Two opposite brothers-chaotic Taehyung and anxious Jungkook-start school together for the first time. Chaos, fights, and unexpected bonding reveal a brotherly love they both hide behind attitude.

Taehyung - 26 years old, 1 businessman in Korea, very rich, widowed after wife died during childbirth Jungkook - 2 years old, has weaker immune system because he didn't get mother's milk, troublemaker, lovely, fluffy, energetic, clingy to his father, Tae is his whole world

A story about love, sacrifice, and the family we choose Kim Taehyung (24 years old) A business student and café worker who became his younger brother's guardian after their parents died in an accident two years ago. Taehyung works tirelessly, balancing university classes, long shifts at Moonlight Café, and the full-time responsibility of raising Jungkook. Despite being exhausted and struggling financially, he never complains. He's gentle, protective, and deeply loving, though he can be firm when necessary (especially about vegetables). Taehyung often sacrifices his own needs-skipping meals, wearing a thin jacket, studying on three hours of sleep-to ensure Jungkook has everything he needs. His love for his little brother is absolute and unwavering. To Jungkook, he's not just a brother-he's a parent, protector, and entire world. kim Jungkook (7 years old) A sweet, polite, and remarkably mature seven-year-old who lost his parents at age five. Despite his difficult circumstances, Jungkook tries hard to be good, to not be a burden, and to make his hyung proud. He's naturally shy and sensitive, with skin that bruises easily and a heart that feels everything deeply. Jungkook is smart, getting gold stars in school, and is generally obedient-though he struggles with eating vegetables. He's perceptive beyond his years, often worrying about whether Taehyung is eating enough or working too hard. His love for his hyung is pure and absolute. When he's scared or hurt, he becomes clingy, attaching himself to Taehyung like a koala. His innocence and sweetness have endeared him to all of Taehyung's friends.

For fifteen years, Jungkook existed only as a name in his brothers' conversations. A photograph on their desks. A face on their phone screens. A voice heard through late-night calls across different time zones. While the six Kim brothers built their lives in South Korea-becoming some of the country's most respected doctors-their youngest brother grew up thousands of miles away in the United States with their parents. Birthdays were celebrated through video calls. Achievements were shared through messages. Love was given from a distance. And distance became all they knew. But when fifteen-year-old Jungkook is suddenly sent to Seoul, everything changes. The brothers who once dreamed of meeting their baby brother again are finally given that chance. Yet reality is far different from their expectations. Jungkook is no longer the cheerful little boy they remember. Years of separation have turned him quiet, guarded, and painfully independent. He doesn't know how to act around brothers who feel more like strangers than family. And the six doctors who spent years regretting every missed milestone quickly realize that love alone cannot erase fifteen years of distance. Determined to become the family Jungkook deserves, the brothers begin a journey neither medical textbooks nor years of experience could prepare them for. Because healing a patient is easy. Healing a family is not. As old wounds surface and new bonds are formed, Jungkook slowly finds himself surrounded by something he has never truly had before-a house full of people who worry when he's late, remember his favorite foods, argue over who gets to drive him to school, and love him unconditionally. For the first time in his life, Jungkook isn't alone. He has six overprotective doctors for brothers. And they're never letting their baby brother go again.