I have a younger sister who has been living apart from me since our parents got divorced. I live with my father, and she lives with my mother. This summer, my father suddenly announced that he wanted to build a new house. I... ended up moving in with my sister at my mother's house. We had just met over the New Year's holiday, so there was no emotional reunion or anything... but... now that we're living together, I'm getting all excited and to make matters worse, my mother is working and won't be home!

"We're not alone! My friends are staying over!" "Oh, okay..." I was relieved... but then... "My sister, three strangers, and me... living under the same roof for the summer..."

This is actually more erotic than I expected! This unexpected erotic situation is sure to lead to some kind of sexual incident!