Considering the amount of content and a fully voiced protagonist(And I do mean fully) 40 bucks wouldn't be too out of place when you consider the fandisc is also included in the game. So for it to be 10 bucks cheaper, and also be on launch sale, 22 is a very reasonable amount to pay. But for a non American, the regional pricing sucks a lot, but that's a different horse.
Game shouldn't have DRM at all, unless you're using the steam version, I've finished a route just fine without this issue. Pretty sure both JAST and MangaGamer work on a DRM free policy but maybe that has changed. Maybe try the installer instead.
I'm certainly enjoying it more then Cou so far, although I remember reading somewhere that while in general it's a great time, the endings suck. And boy, were they right, I got hit so hard by the tonal whiplash that was the first ending I got, that I stopped playing for an hour. Something to keep in mind I guess, from the single ending I got it wouldn't be out of place in a moege but... while I don't want to spoil anything, Narita is on a mission and it isn't some kiddy shit.
Fucking chill, I'm sad that mosaics are still in because of shitty backdoor publisher changes, but that's such a small part of the game. This isn't a nukige, you'll be spending more time talking and fondling girls then you will be fucking them.