Ok Kazuya freaking out over girls in bikini's is just stupid. But i can understand that uncontrollable little monkey from down below. Women will never understand.
Anyone who advocates for Ruka and Kazuya either didn't pay attention to the story enough or are complete idiots. Ruka has literally force kazuya into an illegal relationship with a minor (her) through blackmailing him (threatening to expose chizuru as a rental)