Yakuza Lover.

When feisty college student Yuri is attacked at a party, she's saved by Oya Toshiomi, 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. Adapted from a manga by the same title.