We, the children, were close to each other and soon became friends. The relationship between the three of us has undergone a dramatic change during the three days when our parents were absent. Spring break at the turn of the season and the environment is too free and I'm messing around at home, "My brother, Ichika sometimes sees with naughty eyes." Sudden kiss when I was screaming ... Reason collapsed. Libido that does not stop even if Kanna returns. Inspired by us, we asked for something serious ... We just got hooked like crazy.