Pupa is a surprisingly cute story; there's a lot of gore and violence, torture and mutilation and messed up humans with no morale, but because it's so STEEPED in it, none of it feels horrific; it just seems like you roll with it because it's so far-fetched.
Meaning, it's so unrelatable that you have little problem being grossed out; well, maybe for those who are sensitive and aren't used to such works would find it disgusting, but if you've seen really scary horror including: akira, parasyte, hxh's chimera arc, battle royale, shiki, etc: where it encompasses not only the physical discomforting stuff like mutilation, castration, etc, but also people killing people or people being killed, this is like...so easy to digest.
Well, that and the torture wasn't particularly... necessary to the overarching plot, like the gore and mutilation was just there for the sake of being there, like crossing out the task to make this qualify as horror; because otherwise this is just a manga about incest hahaha...oh man, i've gotten so jaded orz
But basically yeah. Like i said, it's mainly about two sibling's over attachment to each other because they've been plied by the harsh realities of life: abusive father, abandoned mother, physically traumatized brother with psycho emotions and emotionally traumatized sister with a psycho body- ha!
Either way, it's the typical loose canon + stabilizing rock pattern. Y'know, them against the world? So, in that it's okay...far-fetched but okay and sort of cute.
The writing isn't exactly the best; and Yume's (her name alone is unoriginal?) character is boring until that part where she snapped. So, now it's going to be...interesting, hopefully. It's kind of like pushing Madoka into the black hole, cute girl sacrifices her happiness to stay in the dark, empty world with her beloved friends brother.
well, that sums up volume 1+2.
Oh, also, the anime. The anime was what got me into the manga! Thanks to the vocal cast; I'm just partial to the MCs' voices. Well, the only thing I'll say is that the episodes are short as hell, like 7 minutes per episode, including op/end song, aaaand that the first two episodes covered chapter 1... this really doesn't give leeway into the overarching plot; at most they'll probably end at a subplot without giving viewers any idea of what's going on, why is this happening, who's behind it, and will they ever become normal, save themselves or at least be happy. Sooooo that's the anime.