If you actually want to get the "Perfect" ending (the whole game is a little fucked up, tbh) save scumming is the only effective way to get there. It's actually kind of irritating from a game design perspective.
How to get the Perfect ending:
- None of your choices matter for CG unlocks or story except the very first one to give her a towel. All 3 options give slightly different images.
- Use all of your Stam for working, and when you don't need money, just spam attend concerts.
- Save scum both the park (+30 energy) and if she's not performing to avoid wasting time cycles
- Before unlocking the 2nd job, take anything from your park adventures (using items don't cost you time or stam), but after you unlock job 2, save scum the park exclusively for energy
- All toys in the shop are worth buying except for the Didlo. You can easily get it and have time/money to spare at the end of the game if you want the CG.
- The only sex acts really worth doing (aside from unlocking the CGs) are 69, vibrator and butt plug, otherwise just attend concerts.
- Once the story takes a turn, just use the rest command instead of save scumming the park. If you meet the cop 3 times you lose and the likelyhood of getting +30 energy goes way down.
It's also worth it to get your stam to 0 once (do it right at the start by spamming work) since the game will just give you +50 stam with no downside. Similarly, if you only have 200g at the end of a day, the game will give you +300g, but again, you can only do it once.
If you follow the above guide you'll max out her Dom to 100 around day 42.
I'm not sure if it's a requirement, but I would suspect you may be required to buy the butt plug to get the perfect ending based on her reaction to the activity. You may also need to attend a concert knowing she won't be there. You may also need to do at least 1-2 encounters (again, save scum these) in the park after the story takes a turn, but I can't know for sure.
