What sets this apart is the relationship between the main and his sister. It’s endearing and otherwise would be pretty cookie-cutter glow up. When his family is attacked he finds his sister isn’t quite dead, but is instead a demon! Only she apparently has some will to exert on the change, so is kind of like a vampire choosing to not kill humans, despite the hunger. When a demon slayer comes to kill the sister, he protects her and impresses said slayer, who forwards him on to a master that could teach him to be like him. How exactly this is relevant to the sister, we never actually find out. During the training she, like, hibernates? For literal years?

This is where it starts getting a little too silly for me. Montages of training over massive amounts of time and the sister just isn’t dead but sleeps. I mean, presumably, because she isn’t eating people, right? But who knows. But the thing that bugs me most is when characters develop skills offscreen. He will go into different forms and skills, to be used as Deus ex machina resolutions to conflicts later. And meanwhile the thing that I liked, the relationship between brother and sister, is completely nonexistent. There’s a fun little twist with his training near the end, but I still don’t even know why it’s important he become a slayer. Is it actually so people won’t attack his sister? Who apparently hibernates for years anyway, so what danger is she actually in? The plot just seems to be a thing that happens so he can get good and be cool.