To be honest, I was pretty impressed with how quickly they improved on the ingame graphics. Still empty areas you barely use, and some things like getting trapped in a tight spot by your followers can be annoying, but the town feels pretty nice. (I just wish they gave you the bike a bit sooner / did more with some spots like the cave.)
Early on, you can swiftly get through the groping scenes by coming back home usually ~9AM-12PM and then later around sometime after 1PM for the younger and older heroine, respectively. A lot of events / progression start around the tree house, although around Day 10 you can collect magazines around town with Kenji too. This sets a pretty regular pace until around Day 18 or so. What is a bit of a bummer is that I found out Day 30 was the last one on my first time through, and at that point I had just gotten about all of the older heroine's scenes but one.
What unlocks the full gallery in case one can't get all the events is the Dieselmine object upstairs, which I could only activate around Day 20 or so on my second run with all 3 followers behind the MC. For those who just want that, I'll include the system file to this post (or try, see edit below). Admittedly still not sure what unlocks some of the events I couldn't get, like the second public / night Hscene.
EDIT 2: Fixed save file, original was for the previous Unity game. The folder is still in AppData/LocalLow/, but is no longer "dieselmine." Uses japanese characters, which should make it easy to spot.