I’m a Spy in a Republican-Era TV Drama

A famous young idol is in a car accident on his way to an audition. When he opens his eyes again, he finds himself reborn inside the spy drama script for the very role he was headed to audition for. The problem is, he has never read the script! No matter. Since he's here, he might as well make the best of it. With his acting skills, he can practically call himself the King of Spies! But... standing at a crossroads, he watches a colleague glance back every few steps and can't help twitching at the corner of his mouth. If you act that suspiciously, everyone will know you've got something to hide, for crying out loud!