Growing up in a family deeply connected to the animal world, Shouhei Ikushima, allergic to rabbits despite his affinity for their gentle nature, vows to avoid them for his well-being. However, a fateful encounter at 'Trois Lapins,' a rabbit-centric store, introduces him to Itsuki Mito, the kind owner who captures Shouhei's heart. When offered a job due to his compassion for rabbits, Shouhei hesitates, concealing his allergy. As their bond deepens, a crisis unfolds, forcing Shouhei to confront his secret while racing against time to assist Itsuki in finding a lost baby rabbit.