In this short scene, nanao asks kousuke how many times he's had sex with her in the last 30 days. Worried that she's about to have an affair, he tells her to "shake jolt" , which is a sexual slang term for having sex with someone else. Ooh, that's a lot of sex for a guy who's only had sex once in his life. He also tells her that she can't have sex in front of other people, because no one will "comfort" her . Oh, and she'll have to "kiss creak" .