Japanator: "Pupa has been a long, strange ride. I'd love to say that I enjoyed it, but the truth is I couldn't wait for it to be over. Instead of a gritty, disturbing look at a symbiotic brother-sister pair and the challenges that come with turning into monsters, I got a neutered mess that had no cohesive plot. What's extremely frustrating is the fact that you simply can't even blame the constraints of being a four-minute series with a limited amount of resources -- talented writers and artists can tell a nuanced story in less time, if you think about it. When's the last time you watched an excellent music video or short film? No, Pupa is fundamentally flawed in every single way, and will forever live on as one of the biggest disappointments I've ever had the misfortune of sitting through in terms of anime."