Okay, now we're back in the hot tub, where Hirokazu and his friend are having sex. Okay, so we've got a pretty good idea of what's going on. Hirokaze's a little freaked out by the fact that his friend is having sex with her, but he's not about to let it get to him. He wants to know what she's doing, so he asks her to "wash" his back, which means he'll have to wash his throat. He also wants to see what kind of "swish" she is doing with her nipples. He's pretty impressed by her, and he wants to tell her how awesome she is. He tells her to rub her skin with his hands, and then he tells her that he'd like to rub his own skin with hers, too, but that he can't do it because his skin is so thin. Then he tells his friend to rub the nipple of his friend, and she says that she'll do it for him if he wants. She also tells him to be careful around her, because she thinks she'd be a "pervert" if she were to talk about him behind her back like that. He doesn't want to believe that she would do such a thing, but then he realizes that she wouldn't be able to stop talking about him in front of her back, either. So he decides to wash her back with his own hands. He squeezes his own back to make sure he've done the right thing, and when he squeezes hers a bit more, he gets a "swung" and "huff" .