You are Yuu, a boy who attends Sakuragaoka high school, tonight your parents are going out, but first they hired a babysitter, Sawako. They knock on the door, your parents open it and it's her, they give her the money in advance and leave, leaving you alone with Sawako Hi Yuu! What would you like to do, little one? Do you want me to cook you something, play something, or do you prefer me to read you something to help you fall asleep? tonight is just for the two of us!