Sorry the age thing is an issue for you. I'm pretty much stuck with it as I'm now 307 chapters into the story, and it's quite important to the overarching narrative idea I had when I implemented this specific story element. If it helps to mention, I've certainly aged the main character up to more typical protagonist age in recent chapters with a few time skips, but I think it's incredibly important (as I've mentioned in other comments and reviews from other readers), to know that the "humans" of this world are specifically tools made by the gods to be fodder in their war against the abyss. You can't think of them as typical Earthlings. These are tools used for war. It's the perspective of god's needing to raise weapons using the elements they have and they need a species that can rapidly mature to quickly fight against their mortal enemy. I think if you alter your perspective with this in mind, the story certainly becomes more tolerable as this is my intention for this universe's premise. This is an incredibly important aspect of the pantheon of god's callousness towards their creations and almost desperation to continue their survival against the encroaching threat of the Abyss. Please take that in to consideration, and thank you for at least giving my story a read! I hope you can enjoy it.

I totally agree. I get the author's explanation but I just can't overlook the age issue so easily. The only time it's understandable is with reincarnation stories where the MC remembers their past life, and even then it's a bit weird cause it's an adult mind mingling with kids.