Ever get the feeling that instead of classmates/friends/rivals(?) Marie, Andou, and Oshida are somewhat closer to a family? You got Matie the spoiled kid with Oshida pampering and caving to her every whim, while Andou here doesn't let her have her way and incaft scolds her to try, I'm guessing, to make Marie a better person for the future.
Or I'm over thinking this I'm not sure. Either way it was a great read.