Nanbaka The Numbers S01E06 - The 'Booster' Episode

Cell 13 has advanced their way to the final event of the New Year's Tournament. Jyugo and Hajime are battling against the Building 4 supervisor, Kenshirou Yozakura, and an inmate named Musashi. Jyugo is surprised to see Musashi again. Musashi, in search for the "man with the scar on his neck," attacks Jyugo mercilessly. Soon as Jyugo hears about the man with the scar on his neck, something odd starts happening to his body.