In Namimori Middle School, the Namimori dojo coach had gotten Tsuna and Ryohei to guard the dojo, as there were infamous men known as the "Dojo Busters" that came to take every dojo's signboards away. While Ryohei and the dojo members were ready, I-Pin walked in and stated that she was here to take the board, causing many members to try to catch her. I-Pin defeated all of them, but Ryohei caught her. Lambo arrives crying about candy, and suddenly, the real Dojo Busters arrive.
Lambo shoots the Ten Year Bazooka, replacing himself with his future self and I-Pin with her future self. Future Lambo attempts to attack the Dojo Busters, but is kicked away. Ryohei attacks and lands a hit, but is taken down by the Buster's comrades. I-Pin, through an automatic reaction, then takes the entire team of Dojo Busters down, all the while apologizing and stating that it was a habit.
After Future Lambo and Future I-Pin return to the future, I-Pin reveals that she wanted to learn cooking from Bianchi, who told her to get a cooking board and a knife. Due to her nearsightedness, I-Pin went to the dojo to get the board.
- In the manga, the battle against the dojo busters occurred before this Mafia Land battle; however, in the anime, it occurred after.