Kiss of Death

Her father's pharmaceutical company keeping her family in comfort, her post-graduation employment already settled... Kana was enjoying a peaceful fourth year at university. However, after swindling her father into a shady loan with Kana herself as collateral, a gangster named Hiragi Yoji comes to collect the debt. Yoji is up for the role of second-in-command of his yakuza syndicate; in order to present Kana as a gift to the syndicate boss, he plans to make a woman out of her... Abandoned by her parents, carted off by the yakuza...and subject to the relentless Yoji. In these dire circumstances, Kana makes a dire resolution...!!

(Source: MangaPlaza)