Somewhat generic, but not at all at the same time. Its refreshing to see anime with darker story without overblown fanservice. Without over the top action and MC, that doesnt behave like a generic teen moron. Why would i rank it in so high regard? Well... that would be the ending. Without sunshine, rainbows and glitter, full on melancholy and dred. Yes, there are stereotypes, but i cant say i remember other anime with the exact same spin and flavor on them. So yes... Id say it was refreshing change of pace to all those isekais and whatnot, that studios spits out all the time now