Shinda Ouhi wa Nidome no Jinsei wo Tanoshimimasu: Okazari no Ouhi wa Hitsuyou nai nodeshou?

"It would be better if you died," the servants' conversation pierced Queen Katia's heart as she lay ill. The king's affections were now directed towards his concubine, and all that was required of Katia was to perform her duties. Was this the result of dedicating her life to him...? Filled with regret, Katia ended her life, but when she awoke, time had rewound three years into the past!? She had been given a second life, but if things continued as they were, she might die from illness again in three years. If she didn't have much time left, she would live for herself! With that decision, Katia decided to throw away her position as queen and enjoy her remaining three years of life, but—

(Source: AlphaPolis, translated)