Special female detective Hanyu Asuka, codenamed 348 (Sashiba), receives a secret mission from the police commissioner to solve the blackmail case involving a genius Famicom designer. As Asuka continues her investigation, she discovers that Hayami, a gangster, is the culprit. However, after a gunfight, Hayami escapes, and a few days later, policewomen are killed one after another, as if in retaliation for Asuka...

Kazuki moves to Tokyo, aspiring to rise to the top in his Yakuza group. Working directly under his group's kumicho (the Yakuza don) and surviving the group in-fightings, he learns what it really takes to be Yakuza.