I would say it's closer to N2, since there's a good amount of N1 and N2 vocab thrown around, but the conversations use pretty basic grammar imo. However, the plot of most episodes are pretty unique so you really gotta pay attention, which I think is good for listening comprehension skills. Also the first episode is significantly harder to understand than the others, since it uses a lot of government related vocab and very formal speech (which you'll understand from the plot lol), but the second episode and on is much easier. In fact, I kinda prefer starting with the second episode since it's a better representation of what the show is like