My Wife Is a Knight of Justice

On the way home, Izaki Yuki met a heroic girl wearing silver armor. What is it like to meet a female knight from another world and live together? Falling from heaven? In love? These seemed too far away at first. Some are just ordinary life every day. Shirley: "Why did you take me in?" Izaki Yuki: "Maybe I want to get a cat." (Single female protagonist, no system, no sword, pure love for the God of War.)