Histoire de Yakuza.

Yaoi / Action / Tragedy.
Yakuza as part of the plot.

Yaoi.
Korean mafia as part of the story but not at the center.
Too bad it became a bit of a mess aroubd the end.
My very first BL.

Yaoi.
Yakuza x Police Officer.
Yakuza as a background.

Yaoi.
Yakuza x Police Officer.

Yaoi / Action.
Yakuza x Police Officer.
Plot focuses more on the Police part.

Yaoi.
Yaoi as background. Not bad nor good.

Yaoi.
Yakuza as a background.

Yaoi.
Ex yakuza.

Yaoi.
Yakuza as a background.

Yaoi.
Yakuza as a side plot.
1st volume.