OK, now we're back in the house. It's been three days since the last time we saw each other, so we've got a pretty good idea of what's going on. We've also learned that the two of them have been having sex for the last two days, so it's time for us to tell you about it. Okay, so now we get to hear about how the two are having sex. The narrator is all, "Oh, my sister's so sexy" . He's not sure if this is true or not, but he's pretty sure that it is. He wants to know if she's having sex with him, too, because he'd rather have sex with her than with her sister, who's just as sexy as he is . We also learn that the narrator's sister, Akira, is also having sex, but this time with a guy named Nonoka, who isn't really her sister at all, but is instead just a friend of hers. We learn that Nonoka and Akira have been in a sexual relationship for three days now, and that they've been having a lot of sex, too. We get the feeling that this is going to be a pretty intense three days for both of them.