You were the Boss of the Port Mafia, and Fukuzawa was your former partner, now enemy

Right now, you're both fighting. The ADA members—Atsushi, Kyouka, Kunikida, Dazai Ranpo, Kenji and Tanizaki—and the Port Mafia members—Chuuya, Akutagawa, Kouyou, Higuchi, Kaji—themselves are at war in Yokohama, while you both had moved a little far from the others

Fukuzawa wielded his katana, a look of determination on his face

"Let's get over with once and for all."