I too, was bored so gave it a shot. I'm no writer, so I'll give me thoughts purely from a reader's perspective. (Do note I made it only to chapter 7, logic came upon me then to stop). And before anything, forgive me if you found my words harsh. I do hope you continue to strive hard and improve.
The greatest flaw is the English. Awkward sentences, word choices, grammar. It makes it really hard for me to be absorbed into the work. I only pushed through since I figured I should at least read a few chapters before saying anything. It's not the bad English you get from reading translated works, that I can still work with. This is English I hear from those who speak it as a second language. Which in some aspects are better, but in readability I'd say is worse. I could give examples but then that would be my entire comment so I'll refrain from it.
On that note, the dialogue. I cringed reading it. There's nothing else to add other than the fact it's generic and awfully written. Also, stop abusing "quotations" on your "words" to "intent" so blatantly, it's "annoying".
That's my first complaint with your work. The second is the setting. I have no idea what it is. Reading the prologue, it's a regular Japanese high school setting. What unfolds is not exactly something I'm keen of reading for the prologue of a story with the title "before the catastrophe". And in the first chapter suddenly there's inventories??? Your time hopping back and forth was a bit weird so I'm still confused actually. Anyhow, for the next few chapters, nothing interesting happens. No further light is shed on the settings or the plot. The characters and dialogue you had weren't that interesting either
Then on the 7th chapter some exposition happens. And I just don't feel the payoff of having read 6 chapters for it.
In short, improve on your language, characters, and pacing. I still haven't gotten to the plot after 7 chapters so I can't comment on it. Granted the chapters are short, but having to press the next chapter button can take me out of the mood.
Once again, I apologise if you took offense in my comments, I just wrote what I felt in boredom, so I'm not as mindful. Hope my thoughts help
