The Divinely Blessed Saint and His Immortal Witch Wife

Title (Too Long): Divinely Blessed Saint and His Immortal Witch Wife Have Been Killing Slimes for 300 Years and Maxed Out Our Level.

After living a life as an caretaker, Yuuki Nishimura ended his life by saving a little girl from getting hit by a truck. Coincidentally, he and Azusa know each from highschool. So when he found himself reincarnated as an undying, unaging saint together with Azusa in a new world, he keeps himself a vow that he would help Azusa with anything as much as possible like a husband.