Yakuza 0 is filled with side stories like this. They enrich the world and make it feel like a real, lived-in place. If you haven't played the game yet, or if you completed it with a "critical path" mentality, I implore you to go back and look around for a while. What you'll find is just as valuable and rewarding as the main storyline. Plus, it's nice to just stop and smell the digital roses sometimes.