Crows Gaiden: Katagiri Ken Monogatari

Harumichi Bouya transfers into Suzuran All-Boys High School, a school so notorious for its uniformed delinquents that locals call them the Crows. What begins as one transfer student’s casual brawls becomes an escalating war between factions, gangs, and legends, with bonds forged in violence and loyalty pushed past the breaking point. (Source: Kodama Tales) Crows is the prequel of the manga "Worst", and it a story occurring in Suzuran two years before the story of "Worst."

The story starts with Takiya Genji, the son of a Yakuza boss, entering Suzuran All-Boys High School as a transferred senior with the goal of conquering it. During the Freshers' orientation lecture, Yakuza arrive at the school seeking Tamao Serizawa to avenge an injury.