I binge read the vast majority of this story based on a recommendation on this site under another apocalypse story.
This story starts off intriguing, but by later chapters the author starts mixing in too many subplots that seem unnecessary and pointless and forcing them into the main plot. Also, the author forgets some of their own world rules at convenient times to dial up the tension, if you're someone that pays attention to the little details in a story and get annoyed when an author sometimes dues ex machina's their own world rules to get themselves out of a pinch they put themselves in, you may get annoyed once or twice. I can't say that it happens all of the time. But there were at least one or two instances during big moments where either someone made a decision that went against the world rules established or the author forced an event that seemed to go against the world rules established with out-of-thin-air, yet no explanation, stuff. There's also the MC issue for me. He's presented as someone who is strategic, yet, he has a specific power mentioned in the description, so that's not a spoiler. An ability to go back and forth between his school life (the past) and the apocalypse (the future). There are times when the MC does things in the future that should be done in the past and he keeps trying to do these things in the future over and over and over and over again and failing because for some reason the author gives him amnesia that he can just go to the past and prevent the thing in the future so long as he has enough information, access, and determination to do so. Often, with one particular character in the future, and situation, he does, but he still chooses to deal with this character in the future where he's at a disadvantage and it frustrated me each time. There was another situation where MC said to everyone that this would fail in the future, yet he still kept trying to deal with it in the future for several chapters making the story drag up until he had absolutely no choice (the author forced it) to deal with it in the past and everything he did to get access to do it in the past could have been accomplished chapters prior. So that's another thing, I feel like the author liked to drag the story out so much that I got a little frustrated around the later chapters after the author introduced yet another subplot and skipped to see how the end was with the intention of reading the chapters I missed in between and then I was a bit disappointed with the end after investing that much time binge reading up to the later chapters.
This is just my opinion and maybe I'm just getting too old to read these types of stories like I used to.
Oh and you can find most of the chapters on free sites (up to 197) and have to pay for the last four chapters on Tapas if you don't already get it for free on that site