The Servant Prince.

Ten years ago, Naoya was the elite school bully and Takaaki was his introverted errand boy. Today, the tables have completely turned: Naoya is unemployed and bankrupt, while Takaaki is a successful startup CEO. Yet, despite his wealth and power, Takaaki refuses to leave Naoya's side, still serving his former tormentor like a devoted shadow. Driven by a devotion that borders on obsession, this dark, complex drama explores a twisted bond caught between pride, inferiority, and a slowly shifting dynamic.