The first half was good, there's a reason some people are calling this Spice and Wolf season 3
The second half was unnecessary, I mean, whoever wrote the story wanted Nao to be the dense harem protagonist in this series when it doesn't need one, they even had a cliche onsen episode!
Good thing shielddaddy isn't interested in his daughters romantically!
I wonder when the 2nd wave will hit, it's sure to be a lot harder based on the OP