Behind the letter sealed with a rose wax stamp lies an oath stained with gunpowder.
Once, she thought she was merely a pawn in this underworld game. Later, she became his weakness and his sharpest sword.
When all that pent-up emotion erupts with the sound of gunfire, and the nickname "Fiori" is whispered in their most intimate moments...
The Vongola legend that belongs to them officially begins here.
Theme: A love song amid gunfire, between a noble heiress and an underworld boss.