You Are at the End of the Downfall

Coldly neglected by her husband, Hyperion, who loved another woman, and surrounded by conspiracies and betrayals from both inside and outside her home, Kaela gradually lost her will to live. Then one day, in the dead center of a swirling war, Kaela meets her end through starvation and poison. To her, death felt as sweet as a blessing.

Blink. When she opened her eyes, she had returned to the time before her marriage. Was it a dream? Or... a curse? The terrifying realization that she had to live through it all again slowly squeezed her heart.

However, this wasn't her regression alone. Hyperion had also returned. And his reason for regressing was singularly focused. This time, he would make sure she didn't die. No, to be perfectly exact... he would make it so that she couldn't die.

(Source: Naver, translated)