hello guys...anyone know this manga about a flower shop owner × his ex-schoolmate. the fl...

hello guys...anyone know this manga about a flower shop owner × his ex-schoolmate. the flower shop owner runs the shop with his mother and little sister. his ex-schoolmate somehow broke a vase or something(*i don't exactly remember that) when they meet again years later so he ends up working at the shop.
i think this is natsume isaku's work (*or mybe i'm wrong) but i can't seem to find it