It's a fantastic and emotional side story bridging the gaps between Yakuza 6 and 7 and also between 7 and 8. Gaiden is much shorter than a standard Yakuza/Like A Dragon adventure; at about 5 chapters clocking in at roughly 40 hours to achieve a platinum trophy/100%achievements. While the side content is fun, it is noticeably lacking. The substories are one of my favorite parts of this series and they are very very minimal in this entry.