Haruka Sakura, a delinquent high school loner, admires strength and disregards weakness. Enrolling at the infamous Furin High, she aims to become the top fighter among its delinquents.
It is the morning of the school entrance ceremony, and Furin High School has transformed into a group that protects the town now known as the "Chime of the Wind Breaker" - Bofurin.
Furin High School's first-year Class 1 gains notoriety for its fierce fighters. Angered by Sakura's words, Kyotaro Sugishita lashes out, sparking an intense brawl between them as Hayato Suo observes coolly, and Nirei panics.
Rival factions Bofurin and Shishitoren clash, with Bofurin protecting middle schoolers. Sakura gets a war declaration from Jo Togame, Shishitoren's second-in-command. She informs Umemiya, along with Toma Hiragi, a Bofurin Four King.
"That's why I'm going to take all of Furin...and you for myself!" declares Shishitoren's leader, Choji Tomiyama, as he makes his way onto Furin High School grounds. Finally, it's a one-on-one showdown between Bofurin and Shishitoren.
Tomiyama and Togame expel their defeated teammate. Sakura is shaken by this, but Suo gets emotional and defeats Minoru Kanuma, securing another win for Bofurin.