Complex sentence: Gen and Ryuta attempt to earn money to feed Tomoko, getting involved with the local Yakuza, but after the Yakuza betray them, Ryuta kills one of them with the pistol they found, and becomes a fugitive.
Split into simpler sentences: Gen and Ryuta attempt to earn money to feed Tomoko, getting involved with the local Yakuza. After the Yakuza betray them, Ryuta kills one of them with the pistol they found and becomes a fugitive.