Good story, considering its short run. Simple, robust and good ol' gaming system with just the right, small modifications to fit HxH. You stretched out fine, it was good enough for the initial stages.

Likes: I particularly liked how the baby could level up quickly into a mobile and slightly strong toddler. That does skip a lot of boring story, it was refreshing.

Dislikes: This story is too short for me to dislike anything.

Suggestion: I guess there should be some Nen skill basics before even things like Ten or Zetsu. And for a satisfying reveal, start foreshadowing what his Hatsu will be!

In my first review I said go ahead with the breathing exercises but if you do, could you not totally break the lore? And could you also not really make it a crossover? I know you said that you wouldn't but in reality, if I had a dollar for every time someone said they would do one thing and then does another, I would be half way to rich. I also think that your depictions of stats are a bit off and kind of lacking. Strength is fine because, I mean, what else could you put into strength? I mean pain tolerance is a thing that could be put into it and maybe speed but otherwise, it's good. Dexterity is alright. Intelligence is fine but is there a stat that controls the choices the MC makes? You can be highly intelligent and still make stupid choices. Once the MC unlocks Nen, you should go more in depth with that. Maybe you planned that but, just want to help a bit. The last, Charisma, is where I think you need a little work. All the others are fine and can work for the story but Charisma doesn't make much sense to me. The ability to express yourself is important don't get me wrong, but it seems kind of useless otherwise. Maybe having a high charisma allows you to make more allies and make them easier. Maybe a high charisma allows you to lie better or make people believe you easier. It just doesn't make the most sense in my opinion. You don't have to implement anything into your story that I have put but I wanted to write this just so maybe it will help a bit. This is only on the third chapter because apparently, only one review per chapter. Kinda dumb but ok

Um, you said just some breathing exercises from Kimetsu no Yaiba? Aren't breathing exercises kind of common? I personally would be fine with it, but I'm pretty sure if you said nothing about adding in the exercises not many would notice. If you think it would benefit the story then go ahead

Yes please!
I really like the story so far and I think it would be awrsome to incorporate into the story! Thank you

It would be cool if you have the Demon Slayer Corps as another organization like the Hunter Association but it’s one from the Dark Continent and Muzan could be one of the Calamities that the humans have to bring back after a trip there so the Demon Slayer Corps have to follow in order to stop him

just dont break the lore

Yes to Demon Slayer breathing techniques

I’m okay with it

Uuuu interesting idea! I say go for it

go for it. it seems interesting

No, but thanks for the vote

If it’s just concepts of Demon Slayer than I would really enjoy it, but if it also comes along with characters from it I would rather it not be a crossover, I’ll still read it either way though!

Don't change the nen power, with the dark continent you bring plenty of monster without breaking the lore.

no

You know I don't usually like the gamer plot, but with Hunter X Hunter it could work but not in the way your doing it.
For example since he is an SI he could be a specialist and the gamer would be his hastu, it makes in universe sense and doesn't break it