However, around this time a gang war explodes in the city. Gon unveils his intentions to kill Riki and defeats Mika and Touko by using martial arts moves and acid, causing the death of the latter. Enraged, Riki attacks him, learning in the process that Gon is actually his own half-brother.
However, around this time a violent gang conflict arises in the city. Gon reveals his intention to eliminate Riki and successfully defeats Mika and Touko by employing martial arts techniques and corrosive substances, leading to Touko's death. Incensed, Riki responds with aggression against him, learning during the process that Gon is actually his own sibling.