Crows Zero 2

Several months after "Crows Zero" trouble brews again when thugs known as "The Army of Killers" from rival high school Hosen Academy threaten Suzuran High aka the School of Crows. The ruthless Hosen gang go after Suzuran alumni Sho Kawanishi after his release from the reformatory for killing a Hosen member two years back. Kawanishi turns to his younger Suzuran gang members for protection. The Housen gang then seeks outright revenge on the entire Suzuran school, while in-fighting at Suzuran High makes them even more susceptible to the Housen threat.
(Source: AsianWiki)
~~ Adapted from the manga series "Crows" (クローズ) by Takahashi Hiroshi (高橋ヒロシ).