Niangzi Jing Shi Weilai Baojun Nüdi

Zhao Jingyu never thought he'd be reborn, and that his fiancee is the princess who will eventually become an usurper and a tyrannical empress. He did everything he could to try to steer her life away from going down that path of evil. But it turned out that she didn't care about politics in this life at all, she just wanted to spend all her time with him? That's fine, they'll just make some babies, and she'll be too busy taking care of the kids to plan any coups. Sounds like a plan!
(Source: Bilibili, translated)