@boag, Fo the artist, I don't think so though. From my eyes, they looks normal. Because, the average female height in my country is 145cm. The average height of female in asian country is mostly below 155cm. I'm very sure highschool girl from my place would looks like a middle schooler in the west side of the world.
But I agree with the you on the father sh*tty personality. He didn't listen to his son, he pushing his own agenda without telling him anything, and he is pretty much never cared about the mc's feeling(1-3). He said that he is doing something for the mc and being considerate, but what i can see is that he is treating the fate of his son lightly. He has every right to be mad! I even want to punch him myself.