When feisty college student Yuri is attacked at a party, she's saved by Toshiomi Oya, the underboss of a yakuza syndicate. Despite her obvious attraction to him, she convinces herself that she's not in the market for a bad boy type. But when they meet again, she finds herself irresistibly drawn to him--kicking off a steamy and dangerous love affair that threatens to consume her, body and soul.

Unable to shake off the effects of the aphrodisiac he was drugged with, Oya finds an antidote in a passionate night with Yuri. Later, the Oya syndicate packs the banquet hall to celebrate their underboss's birthday. When Oya sees how beautiful and nervous Yuri is, he decides he wants her all to himself and proposes a competition! Meanwhile, Jin, a man from Yuri's past, suddenly appears--and it turns out he's an organized crime detective!