“我喜欢强者，对弱者没有兴趣”——孤独的不良高中生樱遥今年春天以爬上著名的超级不良学校风铃高中的顶点为目标，从城镇「外面」来到了这里。樱在商店街帮助了被一群混混纠缠的少女琴叶。作为谢礼，琴叶请樱在「绿萝咖啡馆」吃饭。在从樱的口中得知他来风铃就读的目的后，琴叶表示「你是不可能爬上顶点的」。樱虽然不由自主地感到愤怒，但随后发生的事态，使他了解到琴叶所说的这些话的真意，以及「现在的风铃」是什么样子。

风铃高中被人们称为「防风铃」，如今已蜕变成为一间守护城镇的学校。而现在是学校即将举行入学典礼的早晨。上学前，正当樱在「吃茶POTOS」吃早餐时，一位开朗的少年榆井秋彦跑进了店内。这个和樱同年级的少年，是来让琴叶看自己穿上梦寐以求的风铃高中制服的样子的。樱被他那极其开朗的性格及言行举止搞得团团转。从店里出来后，这次又受到商店街上人们的友善对待，这使得樱藏不住内心的困惑。这时，有人突然抓住他的手，并表示「请你来帮个忙！」……。

风铃高中1年级1班集结了因打架而出名的强者们。杉下京太郎不顾惊慌的榆井和静观的苏枋隼飞，对樱的言行感到气愤，和樱打了起来，两人豪爽地互殴。可怕的广播声响彻校内，打断了这场攻防战。一瞬间改变了学校气氛的声音的主人，是“防风铃”总代的梅宫一。带着紧张的表情仰望着扬声器的樱等人，发出的是在预想外的梅宫的话——

绝对信仰“力量”的“狮子头连”，为了保护镇上的中学生，樱受到狮子头连副首领十龟条的宣战布告。和“防风铃”四大天王之一的柊登马一起向梅宫传达事情的经过，他们非但没有被指责，反而被抚摸着头说“谢谢你保护了我的家人”。当樱花被不可思议的感情所迷惑时，天真无邪的声音响彻校园。

狮子头连・首领兔耳山丁子说：“把风铃高中连同小梅一起变成我的东西”。防风铃VS.狮子头连，赌上了队伍的一对一胜负，终于开幕！在狮子头连的底盘、大酒馆街进行，樱等人被带到的是兔耳山等人的基地——倒塌的电影院·通称“奥利”。在被狮子头连成员们包围的“笼子”里，同为力量型的杉下和有马雪成的第一场比赛开始了——

狮子头连的兔耳山和十龟不但不担心输了比赛的队友，反而把他从伙伴中驱逐出去。这异样的场景让樱等人不安，但苏枋却罕见地感情用事地战胜了鹿沼稔，防风铃稳稳地走向胜利。接下来的第3场比赛是防风铃四天王柊VS.佐狐浩太，两人好像有过往的样子。对于速度型的佐狐，一开始看起来只是单方面防御的柊，终于显示出了以掌管战争的武神之名冠名的“多闻众”第一的实力——！

It’s now time for the battle of those second-in-command: Sakura versus Togame — a fight that will set things on fire!

Togame can no longer hide the fact he's feeling lost. He remembers when he met Tomiyama, the fun days he had with Shishitoren, how the team changed when Tomiyama became the leader, and the things he's done himself.

It's now time for a one-on-one fight between Umemiya and Tomiyama. Tomiyama believed that by winning against Umemiya, he would obtain Furin High School, freedom, and a sense of fun that would rival no other.

Admitting defeat, Tomiyama tries to pass Shishitoren on to Umemiya — to which Umemiya declares, "Instead of taking over your team, we'll be friends!" Bofurin and Shishitoren are dumbfounded at this turn of events but talks progress, food is brought, and a celebratory afterparty starts.

With the fights against Shishitoren over, Class 1 enthusiastically welcomes Sakura, Nirei, and Suo's return. Their classmates, brimming with interest in the details of the fights, surround them, asking questions. Sakura can't hide his bashfulness.

Ren Kaji, Yuto Kusumi, and Takeshi Enomoto, second-year students from the Tamon Team, start their ruling on who will be Grade Captain for first-year Class 1. Suo is the first to raise his hand, immediately nominating Sakura as the other classmates vote for him one after the other.

Sakura, Nirei, and Suo finish their meeting with Umemiya, the other members of the Four Kings, and other prominent leading figures and join up with Kiryu and Tsugeura on their way home.