Welp, this is an utterly meh game. It's literally a CG collection with some extra steps. The various work-places and events basically have no impact on one another. The Devs even made it stupid easy with that one guy next to the maid shop.
Also, hilariously, you can pay off the debt just by doing Secretary work with Nanami, and not working with Marina at all. As long as you avoid all other events, you can keep the lustfulness of both girls at zero. Dunno if that's worth doing after all.
I've seen people here mentioning NG+ and that fenced area, but I have yet to figure out how to access either of these things. Not that it matters since scenes are stored in the global file, so it doesn't matter if multiple playthroughs are connected or not.
All in all, lame.
The only thing going for it is that the art-style is nice and the girls are hot. Not a completely terrible way to waste a couple of hours, but a total skip if there's anything even marginally better available.