Naruto: Teaching Pays Back a Hundredfold, Making Me the Godfather of the Ninja World

Hoshino Kaede is mocked by a genin for being a “pathetically weak chunin.” His System activates and forces him to take a student within 72 hours.

He sets his sights on Rock Lee, who is furiously kicking a tree at the edge of the Ninja Academy grounds.

“You're going about your training the wrong way,” Kaede says, offering him a scientific training plan. “Want to get stronger? Become my student.”

When Rock Lee masters the Front Lotus ahead of schedule, chakra surges through Kaede like a tidal wave.

Might Guy angrily demands, “Did you steal my youthful secret technique?”

Kaede responds by opening the Three Gates without taking a scratch. The ground cracks beneath him. “No, your student taught me.”