Finally a manga that speaks out against all those mangaparents which just abandon their child for the sake of their careers and whims. It's bad enough that their father does not spend time with them. But even worse, he doesn't even show any interest in the lives of his daughters. All he cares about are their grades, presumably because them failing in school would fall back on and embarass him.
He deserved that speech, and a good beating on top of it.