It's from episode 22. Right at the beginning, but it's only Itsuki's delusion/dream. It didn't happen, or he wants it to happen. But it won't happen anyway. *cellphone rings*
Hello? Ah, Kaede? Yes, I'm on my way to the store right now. Yes, I won't forget it. Bye. *cellphone rings again*
Hello? Ah, Nerine? Yes, Kaede told me. I know, I know. Huh, Sia's there too? Ok. Let me talk to her. Hello Sia, what is it? Oh, you want me to buy some items too? OK, I'll get them. Ok, bye! *cellphone rings again*
Hello? Ah, Kareha? what is it? What, you want me and the girls to come over right away? Well, it's ok I guess, but what for? An ORGY!? Um, isn't that a bit too soon, we just had one 2 days ago. Yes Ma'am, Right away! *Runs at the speed of light!* XD