There's 5 girls in total; but the harem aspect isn't till the end when you can nope out. We've yet to meet the other 2, but they all do their best to be of great help. It's a story more focused on the plot rather than the romance.
There's no romance but there are girls that have an interest in him but they have their own screen times so there's isn't 2 girls that appear at once yet and the MC basically ignores em all unless there's something monster or demon related
Is this harem? Or romance?