Naruto: The Strongest Medical Ninja in the Shinobi World

Transmigrating into the world of Naruto and becoming Tsunade's subordinate, the system's mission requires him to become the strongest medical ninja in the ninja world. Thus, Hoshigen Chisaku declares: "I am the man who will become the strongest medical ninja!" Years later, Hoshigen Chisaku questions: "What? Becoming Tsunade's man doesn't count as completing the mission?" ...Disclaimer: Single female lead Tsunade, baby planned~~