Kujo Ai was entrusted to Kiryu by Kazama's father and asked Kiryu to take good care of her.
As a result, Kujo Ai followed her own temperament and became a slacker who only liked playing games, singing karaoke, and not doing any serious work (?
Became good friends with Brother Majima and Kasuga, and would fight with Kiryu from time to time (?
Maybe the timeline is in Yakuza 0.5? Many details are not verified (lying down
Regarding age, all members are young, and there is no betrayal, no jail time, no life-and-death struggle, and no illness.
I want to meet this requirement, so it seems to be empty (?
Just treat it as the entire branch world of Yakuza, which has nothing to do with the main plot. Everyone just needs to live a relaxed and happy life~
Intention: Life is so long, why not take a vacation?