Watch Online Free on Watchseries. A few weeks after their last deadly fight, Ken and Seijiro are still living for brawls. But when Ken’s junior Shun (Kinomoto Minehiro) gets entangled in Grips’ drug trade, tensions escalate. Around the same time, Ken receives a challenge letter from Grips leader Masa, demanding a final showdown at the underground fight club. At last, the ultimate clash—Ken vs. Masa—begins.