For eighteen years, Felix was the pride of the illustrious Vance family—a prodigy who dominated international math olympiads, conquered grandmaster chess titles, and spent ninety percent of his life buried in dusty leather-bound books. Positioned as the youngest of five high-achieving siblings, his entire identity was built on absolute perfection. Everything shattered when a hospital error was uncovered, revealing he was swapped at birth. Though both families agreed to keep all children and refuse to cut ties, Felix is quietly terrified of losing his place. Now, the former "golden child" is trying to navigate this new dynamic with the real Vance child returned home. Lacking social intuition, his earnest efforts to connect with his new non-biological sibling are hyper-analytical, painfully awkward, and unintentionally hilarious.