Protagonist Shuuchi who lives alone in the rural area, my sister Chizuru who lived away for 8 years came with cousin Suwana! One man, might the inconvenience in the solitary house in the rural area, seem to have come to do personal care, The reason was actually an attack of intense love to a favorite older brother! To younger sisters who approach continuously regardless of day and night, though it was happy Shuuchi is worried, even a how many cute younger sister... I cannot connect the sexual relations with the younger sister! Then, the last resort that he thought out is?