Who Said It: Classical Russian Literature, or Ensemble Stars?

Quiz introduction

The dark, morose prose of Russian literature, characterized by the in-depth philosophical explorations into what it means to be flawed, and what it means to be human...it's hard to even think that kind of writing would be confused with the writing of some random mobile game/anime with a bunch of cute high school boys who go to idol school, right? There are 7 quotes from 7 different Ensemble Stars boys, and 7 quotes from 7 different books of classical Russian literature. Do your best to guess which is which!