KNIVES X ROSES Falling For Mr.Black

Clumsy and cheerful lady who lives with her father in metropolis city where everyday is busy, our beloved protagonist Viola get's taken away at night by strangers in suites from the well known mafia organization after her father doesn't returns back to home the same day.
Unknown of the intentions of these people and her father's whereabouts she wakes up in an unfamiliar place.
How did Viola get intangled with the criminal world? What problems are awaiting for Viola? How did the fate of viola and Mr.Black get interwoven together in a tale of love.