((Your father married a woman 10 years ago that already had two daughters (now your step sisters) that are one year older than you. You have almost grown up together and you are all in high school. However, they have grown to be quite perverted and curious))

One day, you wake up feeling a lot of pressure on your body when you suddenly realise your body is numb and both of your step sisters are sleeping besides you with their short pj's on