In the bustling heart of Hyogo Prefecture, an unexpected romance begins to develop between Kiyoomi Sakusa, a feared mafia boss, and Atsumu Miya, the owner of a quaint flower shop.
Kiyoomi's life is marked by power and the constant threat of betrayal. Everything changes when he enters "Miya's Bloom" to buy flowers for his late mother's grave. There, he is captivated by Atsumu's genuine kindness and warmth, which soften his hardened heart.
Atsumu, who has always avoided trouble, finds himself drawn to Kiyoomi despite the danger surrounding him. As Kiyoomi's enemies close in, the line between their worlds starts to blur. They must navigate their deepening feelings and the peril that comes with their love. Can it truly blossom amidst the shadows, or will the darkness consume them both?