because the story is almost identical more like copyright infringement then inspired by

the story is only slightly changed from a famous one called that time I got reincarnated as a slime the author just moved some sences around and added or cut small pieces from the original story to tell the truth im surprised they haven't been hit with a law suite yet so I would suggest you just read the original

the side story is interesting but it would be better in a book of its own

needed to at least tell how he died in his original life

it said he was only able to get the last test so I think he only got the one of him in armor not a vid of him in normal form