Naruto: Wooing Tsunade From Day One! (novlove.com)

(Naruto + Single Heroine Tsunade + Romance + Action) A failed author transmigrates into the Naruto world, becoming the younger brother of Konoha’s White Fang, Sakumo Hatake, and the uncle of Kakashi. He gains a cheat ability—enhanced cellular activity. Coincidentally, just before the Second Shinobi War, he participate…