Oreshura is a slightly odd case. On the one hand, it's an entirely ordinary harem comedy. On the other hand, it tries to be a little bit more than that via character development. To be clear, the characters aren't much beyond tried and true archetypes. There's the protagonist Eita, who is pretty generic and uninteresting on his own, the "almost-an-imouto" childhood friend, the gamer girl who knows ...
Oreshura is a slightly odd case. On the one hand, it's an entirely ordinary harem comedy. On the other hand, it tries to be a little bit more than that via character development. To be clear, the characters aren't much beyond tried and true archetypes. There's the protagonist Eita, who is pretty generic and uninteresting on his own, the "almost-an-imouto" childhood friend, the gamer girl who knows the protagonist from online games, and the tsundere hall monitor. Separate from them is the white-haired Nasuzu, who is not as much of an archetype. Nasuzu is a reasonably unique character in that she seems like she always lies to everyone, but there's a twist to it. I didn't particularly like her, but that's just because my preference was the hall monitor girl (named Ai) and this was a competitive harem (hence the word "battlefield" is in every episode title).
Crunchyroll describe the protagonist as having "a disdain for love," but the simple fact is that it's only true for about the first 4-5 episodes. It's still kind of there for the rest of the series, but it was honestly just there as a mechanic to pair Nasuzu with Eita. Despite being the main premise of the series, it's far from the series' focus. Overall, the series is a funny harem with no particularly inventive ideas for it claim as its own. It almost tricked me into thinking that character development was going to be a major component towards the end, but then the ending itself proved me dead wrong.
My biggest disappointment with Oreshura is that the show starts out by giving the impression that it's going to be something new and inventive, with elements of psychopathy and blackmail. Unfortunately, these elements all but fade away into obscurity by the show's conclusion. There is no payoff or consequence for the crazed actions of Nasuzu. At the end of the day, everything fades into yet another brightly-colored harem. Keep in mind that this is not inherently bad. The show is simply more shallow than many of its fans would have others believe.
Anyway, I won't drone on any longer. There really isn't much to say. The show is very funny and perfectly entertaining to watch. More than that, it's very good at choosing its cliffhanger points, which make the show surprisingly difficult to stop watching. It's not "good" in the sense that it does anything new or has groundbreaking characters, but it is "good" in the sense that it is very funny and quite fun to watch. Just be sure that mildly shallow romances, archetypal characters, and typical harem antics are okay with you before watching.
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