In Konoha, I Ruined the Konoha 12

The lazybones Lu Yuan transmigrates to Konoha, where the Self-Discipline System activates from the start and forces him to become the Demon King of Self-Discipline.

He drags Shikamaru into taijutsu training, hauls Choji off to lose weight, and makes Sakura work on her pectoral muscles.

He gets Sasuke to practice eye exercises and helps Naruto pursue Sakura.

Might Guy: "When I saw Luo Yun training in taijutsu, I knew I'd gained another rival for life."

Nagato: "I finally understand that someone really can take Shinra Tensei head-on without taking a single step back."

Obito: "I had five seconds of invulnerability, and I still got hit."

Madara Uchiha: "Who the hell said he's just a taijutsu ninja? What was that roaring ocean supposed to be?"

Kaguya: "He could still move at a brisk pace in the magnetic dimension and beat me up."

Ōtsutsuki Isshiki: "Forget it. I'll just keep lying low. Konoha is far too dangerous to mess with."

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.