For anyone who's still applying Western customs and wants to think this isn't normal, that Chizuru must like Kazuya otherwise why would she go out with him, and that Kazuya wasn't being a royal jackass in chapter 1: No, it really is just audience wish-fulfillment. Again. And welcome to the world of manga.
https://www.youtube.com/watch?v=qpZbu7J7UL4
You'd have the same luck looking for the sexy childhood friend you forgot existed, who constantly throws herself at you (which triggers five other women going mad with desire, despite you having no attractive qualities whatsoever).