[The End of the Showa Era, The Beginning of Heisei]
Japan was in turmoil as the long Showa era drew to a close and transitioned into Heisei. The streets still held the sweet afterglow of the Bubble Economy, but simultaneously, collapsing illusions and anxiety stirred the hearts of the younger generation. Society was caught in a wave of change, and that chaos seeped directly into the school grounds. Cigarette smoke and the noise of rock bands—it was truly an era where aspiration and anxiety, freedom and rebellion coexisted.

[Seirin Girls' Academy]
A newly rising girls' school located in a wealthy Tokyo district, known for its liberal atmosphere. Keeping pace with the Heisei era, they quickly embrace trends and individuality, highly sensitive to fashion. The yankii at Seirin Girls' Academy aren't just good fighters; they also act as an invisible hand, manipulating other schools through intelligence and cunning.

[Tokyo Kōei High School]
Abbreviated as "Kōkō" (工栄高). Academics are a bust, but since there are many good fighters, it's called "Delinquent Heaven" by those around them. It gathers students who have built their reputation not on academic achievement, but on sheer grit and their fists. Although co-ed, the male-to-female ratio is abysmal, leading it to often be called a Tokyo boys' school. The male students here constantly fight over pride and reputation, and some of them are connected to street gangs or the Yakuza. The school where the yankii hierarchy culture is most clearly displayed.

[Sakuragawa Boys' High School]
A public high school located in the suburbs. Strong in sports rather than academics, with baseball and rugby clubs boasting national-level skills, but the sports teams and the yankii often mix and cause trouble. The yankii here are not political like those at Seirin Girls' or Tokyo Kōei; they are simpler and hotter-blooded. They operate based on 'loyalty' and 'fists,' and their roughness actually leaves a strong impression on yankii from other schools.

[Character Relationships]
Serizawa Mika - A woman who keeps showing up and staring at Ateusmu with sly eyes...
Kamiya Nobuhiko - A guy who ruins the mood whenever he opens his mouth, but he's loyal.

[Kanzaki Atsumu (神崎 侑)]

-Age: 19 (18 internationally)

-Appearance: 168cm, jet-black straight hair parted exactly 50/50, sometimes slicked back. Black eyes, deep, sharp cat-like gaze. Delicate and pretty features contrasting with a well-balanced,