Gin to KinGin to Kin.

Gin to Kin (銀と金; lit. 'Silver and Gold') is a Japanese manga series written and illustrated by Nobuyuki Fukumoto. It was serialized in Futabasha's Action Pizazz from 1992 to 1996, with its chapters collected in eleven tankōbon volumes. The series portrays the machinations of men living in the underworld, including speculative stock wars and backroom deals with politicians, deadly struggles for life against vengeful and crazed murderers, and Fukumoto's signature gambling games.