Naruto: I Will Return My Teachings Ten Thousand Times and Become the Godfather of the Ninja World.

Hoshino Kaede was ridiculed by the genin that "the chuunin is too watery", and the system was activated forcing him to accept a disciple within 72 hours. He targeted Rock Lee who was kicking a tree frantically on the edge of the Ninja School playground. "Your efforts are in the wrong direction," Feng handed over the scientific training plan, "Want to become stronger? Become your teacher to me." When Rock Lee mastered the Lotus Flower in advance, a tsunami of chakra surged in Maple's body. Metkai asked angrily: "You secretly learned the secret of my youth?" Feng opened the three harmless doors with his backhand, and the ground cracked: "No, it was your apprentice who taught me this.