Renegades: Battlegrounds.

When fifteen-year-old Ren Ryūhara's brother falls into a coma after a brutal knife attack, Ren transfers into Sakura High as a first year student to uncover the truth. There, he discovers that his older brother founded the school's most notorious gang!. Ren is this levethrust into a world of territory wars, honor codes, and brutal street fights. The charismatic but enigmatic Fujimoto Hasegawa now leads Sakuratei, and he reveals that Crimson Dragons are responsible for Kaito's condition. War is brewing, and Ren must choose either he walks away from his brother's legacy, or dives into the violence that destroyed Kaito's life. But Ren is hiding a terrifying secret. He is experiencing visions.. terrible visions, flashes of violence, blood, and a future that hasn't happened yet. With his new deadly ability to leap through time he could save or destroy everything. What would you sacrifice to save someone you love? And what if saving them meant losing yourself?