Responses
since there is supposed to be 11 chapters..
I also thought that there was a prequel but apparently the author wrote only 3 mangas and this one is the prequel (!) of this one: Soshite Sekai wa Kimi no Tame ni (but it isn't translated yet)
I found a list, that had 8 mangas under Takamine Akira's name.
it seems like there is a prequel to this.. but i looked and all i saw was a sequel. but i feel like im missing part of the story. hopefully we will get to learn more as it continues?