The elder sister "Ruru" and the younger sister "Hana". The nieces, now a little more grown up, come to their uncle's house by themselves. "Uncle, we came by ourselves," the nieces say, innocently clinging to them. He has always treated them as "kids", but when he meets them for the first time in a long time, they have grown from children into young girls and have reached adolescence. Uncle, who can no longer see them as "kids" as he used to, becomes captivated by their small bodies that are not yet fully grown up and their adolescent hearts...