The story follows Hajime, who upon being isekai-ed with the rest of his class, gets one of the weakest jobs and now has to survive all on his own. To do that, he becomes stronger and essentially lets go of his humanity. But as he meets new friends (and girls for his harem) he gains back that humanity.
This is most definitely not for everyone, the author really embraces the chuuni side of the story. But I would recomend checking volume 1, if you can get through that you can get through the full story.
The part I disliked the most is how the author often focuses on characters not on the main group. Yeah it lets these side characters develop and there's also a lot of build-up for future payoffs, but it's hard to read about characters I don't care about. The best example of that is the final battle, everyone fights in it and you can be sure you're going to read about everyone's fights, so something that really should only be a volume long becomes 2 volumes long.
But like I said, overall, I like the series and would recomend checking it out. You can read just the main series like I did, but I think the payoff's bigger if you read the Zero spinoff and the afterstories as well.
