Naruto: Teaching Makes Me Stronger

Mugetsu transmigrates into the world of Naruto as an ordinary Chūnin instructor in Konoha—while secretly serving under Danzō’s Root Organization. Knowing that weakness means death, he resolves to change his fate. When the Teacher System awakens, Mugetsu gains power through his students’ growth. [First A-Rated Teaching Evaluation Complete — Reward: Mastery in Fire Release Chakra Nature Transformation.] [Student Shisui gained +30 Chakra. You gained +60 Chakra.] From mentoring Shisui, Kakashi, Obito, Guy, and Rin, to researching Sealing Techniques and Breathing Styles, Mugetsu quietly shapes Konoha’s future geniuses while growing into a legend himself. But as the Third Great Ninja War approaches and Root’s shadow closes in, Mugetsu must decide—will he remain a pawn of Danzō, or rise as the teacher who forges the next generation of heroes? — Description from novelcodex.org