Raised in her grandmother's flower shop following her parents' passing, Tsubaki Takeda's livelihood hinges on the patronage of the renowned Shinomiya clan. However, when the Shinomiyas divert their business elsewhere, Takeda's shop faces imminent closure. In a surprising twist, the Shinomiya patriarch proposes a solution: they will resume purchasing from the Takedas if Tsubaki consents to wed their younger son, Ren. Thus begins a tale of young love blossoming from a contractual arrangement between a humble florist and the heir of a prestigious flower-arranging dynasty.