Oh well, that ending was rushed... Romance was kind of important thorough the story but they never showed what happens between Miyuki and Senpei. Debt Collector getting matched with Ruby also seems like an afterthought. And what happened with Hina?
But really, what was lacking in this story was a real payback for all of what Chouko did. She gets away with all of it. Seriously, I never wished death upon a character as much as her. Losing at Wimbledon was clearly not enough.