I strongly recommend Anti-Japanese Special Sniper God to you! The female protagonist was a modern sniper. She traveled back to the Anti-Japanese War and became a sniper god with her extraordinary marksmanship. The male protagonist was also a soldier, an elite in the novel. The two met during the war and knew each other. Together, they shouldered the iron mission. This is a hot-blooded novel full of battle elements. I believe you will like it. I hope you like my recommendation. Muah ~