College student Ryoichi begins a 10-day cohabitation with his step-sister Arare, and feels the twist of fate with a woman he once loved. Rather than the erotic elements, the presence of Arare stands out, making it an enjoyable watch for those who are into sisterly figures. The interactions with the sister and her cute smiles are charming, so it is recommended to check out the sample videos and photos before considering a purchase.