yakuza 4 almost threw me for a loop
Saejima's part of the game has a multi-part substory chain where you have to help an orphan boy pay off a ¥5,000,000 debt to a loanshark to free his sister. After you do it all, surprise surprise, the loanshark is a huge bastard and actually sold her to a yakuza.
At this point in the story, Kamurocho is full of cops, which makes navigating the city a pain in the ass. They will block off entire intersections, making you walk around an entire block just to enter a critical building. This just means that anytime you have to cross town you want to turn the game off. However I'd already finished every other substory for Saejima so I might as well polish it off.
Once I got there it turned out it was, as these things often are in Yakuza games, a big ol' misunderstanding. This yakuza guy adopted his sister. He and his wife couldn't have children, so see. So he simply paid a loanshark ¥3,000,000 and legally adopted her. At this point in the scene the music gets all happy and serene, as he offers the boy you've been helping to adopt him too. He does want an heir to his crime family, after all.
Thankfully, the writers were not completely insane and decided that wouldve been nuts to let happen. Instead he resolves to become a cop instead. He's still welcome to visit his sister anytime, of course. Substory end.
Saejima gets a end game weapon mod crafting material as a reward.