Kaito Jin is a lone wolf who rules the streets of Roppongi without allegiance to any gang. Known for his charm and defiance, he often clashes with the Haozakura-kai yakuza gang. Things take a turn when he meets Masami, the niece of the gang’s boss, and finds himself caught in their world. As tensions escalate, Jin grows close to Suzuhata, one of the yakuza members persuing him, who reminds him of his dead young brother and becomes his unexpected ally. But then Masami is now dangerously obsessed with Jin, and the consequences of his entanglements come to a head.

Jin’s recent life as a gigolo had been going terribly. No matter how long he waited, he couldn't find any good-looking woman. When he did finally find one, she turned out to be in the same business as yakuza and ended up taking his money, and to make things worse, she was into sadomasochism. In the middle of this mess, Jin runs into Ranko, one of his ex-girlfriends and both begin living together again in a strange and unexpected arrangement. Ranko now wants to live a honest life with him, but Jin hasn’t changed at all...

Jin gets kicked out of the Ranko's apartment and uses his gigolo skills to find a place to stay for the night. He meets an absolutely gorgeous hostess club girl and she offers a deal: if Jin "finishes" first, he becomes her kept man. Jin wants to be taken care of, but his pride won’t let him lose like that. In the end, though, he’s completely defeated. Now, while his new "owner" keeps Jin around, she’s also being pursued by two men: Toyama, a brainy yakuza, and Oba, the man who sold her to a brothel. As Jin watches the situation unfold, he ends up caught in a dangerous incident far beyond his expectations!

Urged to quit the gigolo life, Jin sets out to prove he’s still got it. But his pride gets him into increasingly risky situations, including a disastrously public tryst. While fleeing a group of Yokohama punks, he hides in a car and meets Akiko, a fierce, beautiful woman who immediately becomes his new obsession. There’s just one problem: Akiko is the leader of a rival biker gang. And when Jin seduces the girlfriend of the opposing gang’s boss, he becomes the target of a dangerous vendetta. To make things worse... Ranko is kidnapped!

Jin Kaito returns to his womanizing ways, despite Ranko's worryings. His next conquest? Tomoko, a fiery beauty who just happens to be the mistress of a powerful yakuza boss. Frustrated by her lover’s impotence, Tomoko unleashes her desires on Jin. But passion turns dangerous and Tomoko, obsessed with him, orders an attack on Ranko. Jin barely saves her and things seem to calm down, when the danger strikes: Kuwata, an ambitious underling, plans to take control over the gang.