Hokage Madara, I'm Here to Save You

The heroine, a student from a modern medical college, traveled back in time to the Warring States period of Naruto, activated the system, became a close friend with Madara, rescued Izuna, pulled Madara into infrastructure construction, and unified the ninja world! By the way, I became Banye's wife The author is a complete novice, please forgive me for any bad points.