There was a manga with the same name it seems that the author either didn't know (which is very unlikely) or he wants to copy-write it into a novel or he wants to make changes to the story just look up the name and you will most likely find the manga lets hope this guy isn't plagiarising the works.
Mashiro1
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LIKEMashiro1:I will say honestly I have watched it’ s anime and also have read the manga. Yes, I am plagiarising the work same concept as anime and manga.