Yokosuka Outlaw Chronicles.

Shō is a troubled girl stuck in a miserable life: an alcoholic father and a no-good boyfriend. When she runs into trouble with members of Yokosuka Blood, the gang she was forced into, her unexpected saviour is none other than Ikki—the former leader of their rival gang, Yokosuka Jet. As Shō tries to escape the gang life, she’s caught by her own team and brutally beaten…