Doku wo Kurawaba ai Made

This is the story of Luciana, the illegitimate daughter of the Arcadia family, which controls the underworld. Her peaceful days working at an orphanage come to an abrupt end when the current head of the family summons her and her siblings. She receives an ultimatum: she will be permanently banished unless she comes forward with a fiancé and declares herself the next head of the family. Desperately searching for a temporary partner, she encounters Ral, a man as dangerous as "poison". "Will you swear eternal love to me, or be kept and killed? Which do you prefer?" An immoral love story depicting the twisted romance between the outcast daughter of a mafia family and the young head of a rival organization!