Yakuza Kiwami 2

Majima Saga is a new mode they added into this game that wasn't in the original game that unlocks after you beat certain chapters in the main story. The basics of Majima saga is that it contains 3 extra chapters based on you playing as Majima and using his Mad Dog of Shimano fighting style once again and dealing with problems facing his Yakuza family along with closure about someone from Yakuza 0. You unlock all 3 chapters after finishing chapters 5, 8, and 11, you'll get notifications when they unlock. Overall completing all 3 chapters shouldn't take you long to beat the average time to beat all 3 chapters was 1.5 hours.

While playing this mode you can do basically the same thing Kiryu can do in Kamurocho which is play minigames, shop for items, eat food at restaurants to restore health. There are no sub-stories in this mode so you don't have to worry about that.