My little sister is about to be born, so during summer vacation, I ended up going to Natsukaze Village, where my mother's relatives, the Yumesaki family, lived. Natsukaze Village is a very small country village. Vast fields stretch out. The blazing sun, the sounds of cicadas and evening cicadas. And... the sexy, charming older sisters who adore me. For the entire month of summer vacation, what kind of summer thrills and heart-pounding moments will I feel while “holding hands”? That... is entirely up to you.