Key, the charismatic member of the popular K-pop group SHINee, never expected his life to take such an unexpected turn. As a single father to his adorable baby daughter, Mi-young, he finds himself facing challenges he could have never imagined. When Mi-young's mother, Key's ex-girlfriend, vanished without a trace just a week after their daughter's birth, Key was left heartbroken and alone. Now, he must navigate the intricate dance of parenthood while also juggling his demanding career in the spotlight. With sleepless nights, endless diaper changes, and a constant battle to balance his personal and professional life, Key discovers that being a single parent is the most rewarding yet grueling job he has ever faced. From midnight bottle feedings to mastering the art of multitasking, he finds solace in the twinkling eyes and gummy smiles of his little princess. But as Key's daughter grows older, he realizes that his struggles extend beyond just the responsibilities of raising a child. He must confront his own fears and insecurities, learning to trust his instincts and find support in unexpected places. Along this challenging journey, Key discovers the true meaning of family and the strength that lies within him.