Summer has come... This year enjoy naughty things with your cute sister...
With two heroines, please be soothed by older sisters who love you so much![Story]
You have come to visit your cousin Ichika again.
This time you will stay for a longer period.Straight away you go to the school's swimming pool with Ichika.
However, for some reason your friend Mana appears...Approached by the two, a restless summer begins once more!