I Became the Tyrant's Limited-Time Wife

I have possessed the wife of a tyrannical emperor who is destined to be poisoned to death. The problem is, this tyrant goes mad after my death and ruins the country! With just two years left in my doomed life, I try to change my fate and take care of the tyrant's mental health a little... 'Leah, why haven't you asked me if I've eaten breakfast lately?' 'You're healthy now, right?' That afternoon, he collapsed after emptying his cup, smiling. 'No way... You didn't intentionally drink poison, did you?!' Source: MU Includes 23 extra chapters.