I’Ve Sworn To Be In The Afterlife, But It Became A Mess After Reincarnating

Briefly about I’Ve Sworn To Be In The Afterlife, But It Became A Mess After Reincarnating manga:

Long ago, a princess and a knight fell in love, but couldn’t be together. They promised to meet again in the next life where they could freely love each other, but there’s a problem–they weren’t reborn in the same year!