On an April night in Tokyo, still too early for fireworks, university student Kakeru Mano meets a woman named Koharu Fuyutsuki. She is a beautiful girl who stands out from the crowd, laughs often, and radiates warmth that sharply contrasts with Kakeru's introversion. However, there is something Kakeru doesn't initially know—she is blind. Unlike Kakeru, Koharu hasn't given up on anything despite her blindness. She attends university daily, engages in clubs, makes friends, and dreams of launching fireworks one day. Kakeru wonders why she desires this when she can't see them... but perhaps it doesn't matter. And maybe he can start moving forward too, for the girl who has always been by his side.