I'm just trying to figure out a good age/time for it to take place in. High school would make the most sense. Brother's friend comes over to hang out, but he's gone, the girls trick him into thinking the brother will be back soon and end up completely taking him over. But, this would have to be 16 or 17 year olds, possibly 18 if you want me younger and the twins want to be seniors or vice versa. I just see the dominant parties being older