Synopsis: In high school, Lan Ling and Lu Chen were inseparable best friends, secretly in love with each other. But their youthful insecurities and misunderstandings led them to part ways at graduation, leaving them with regrets. Years later, Lan Ling has become a capable, independent CEO of a startup, while Lu Chen, after a failed marriage, is an ordinary office worker raising his son alone. A chance reunion at a class gathering brings them together again. Seeing the longing for a mother's love in his son's eyes, Lu Chen feels the emotions and guilt he buried for years surge back to life. He resolves to make up for the regrets of the past and bravely win back the girl he's kept in his heart for so long, for his child and for himself. But standing between them are not only the passage of more than a decade and their vastly different lives, but also the excellent suitors around Lan Ling, the entanglements with Lu Chen's ex-wife, and their fears of past hurts and an uncertain future. This is a journey of courage, growth, and healing: the story of how a single father breaks through the barriers of reality and crosses time to fall in love again with his former “brother,” now a “queen.”