This is garden variety isekai. It tries to pretend there's more to it than the protagonist building his harem, but as soon as wish fulfillment is even a tiny bit threatened, this pretense goes out the window. Like, wolves and giant spiders domesticated overnight and eating vegetable diet simply because protag's fields produce nothing but? Easy as pie.
It's slop, really. Passable to kill some time if you find yourself entirely unwilling to strain your brain muscle, but otherwise absolutely worthless. 3/10.