It is however, very short. I feel like the manga doesn't cover the 15 light novels at all, because I am a little confused. The story presented here is cute, complete, a little weird and lowkey terrifying. But I feel like I am missing out on something pretty great due to the lenght. I didn't like the chapter "explaining" the puberty syndrome with quantum theory and I am missing the emotional impact that could have been landed with more chapters and volumes.
The concept of a girl slowly being erased is wild, cool and terrifying. I would have loved to see it expanded upon.
