20xx年、中華系マフィアに支配された街「大歌舞伎町（グラン・カブキタウン）」。ここではアジア最大の歓楽街として人々が享楽に酔いしれる一方、警察、司法さえも手の出せない独立無法地帯と化していた。この街に降り立った警察庁の特命密使「ichiyo」は、家族の仇のため、また、日本の平和を守るため、マフィアのボス「九龍」たちに挑んでいく。アサシンichiyo、暗殺オペレーションスタート!!
In the year 20XX, Grand Kabuki Town is ruled by the Chinese mafia.
People come to this town, one of the largest entertainment districts in Asia, to revel in pleasure and entertainment. It has become a lawless area where the police and government are afraid to enter.
Ichiyo, on a special mission from the National Police Agency, comes to this town to take on mafia boss Kyuryu and his henchmen to protect the peace of Japan and to avenge his family.
This is the beginning of Ichiyo’s assassination operation!
