URAGIRARETA JOOU WA, URUWASHI NO DANSHAKU NI TSUKUSARERU

Married to work, Estelle reigns supreme as the matriarch of the kingdom of Elandril. However, on her deathbed after decades of selfless service, Estelle takes a final gaze at her most trusted advisor... only to realize she had been betrayed. With her last breath, Estelle vows, "Should I be reborn... never again shall I rule as King." Alas, Estelle wakes up in a mysterious mansion in a peculiar world. And there stands a man who entreats, "There is only one thing you must do for me. Remember me." With those words, King Estelle finds herself reborn as a princess, 150 years after her death. Destined once again for queenship, Estelle journeys - this time - to destroy her marriage to the kingdom.

(Source: PocketComics)