Read Manhwa I Became The Tyrant’s Servant online in English. Also known as I Became the Tyrant's Dishonest Adviser and 폭군의 간신이 되었다.

A worn-out customer service worker suddenly wakes up in the body of a duchess from a fantasy novel she once read. Now acting as adviser to the empire's tyrannical ruler, she has to stay constantly alert, knowing that his short temper leaves no room for hesitation or error.

She puts her real-world experience to the test in the dangerous arena of court life, fighting to avoid the tragic end written for her character. But the longer she remains by his side, the more she notices subtle differences that hint at a deeper, more complicated connection than the story ever suggested.

This series may appeal to readers who enjoy fantasy romance, isekai adventures, and tense stories of survival and intrigue.