After attempting (and failing) to get past the first phase on an R4 running WoodR4 (unpatched rom, mind you), I am willing to suspect there's a few more AP measures than just the ones that prevent loading. While the Stat checks were nowhere near as volatile as in Love Plus, I was completely unable to get ANY of the girls, whereas in Love Plus I was able to get Nene (on my first try, no guide beyond startup) by day 63. (for reference, you have 100 days before the game boots you back to title screen and you have to try again from your LAST save. good luck with that if you save on day 99. If the AP measures I believe exist actually do, good luck if your last save was on day 15.)
Will be trying this again with an initialized save and the patched rom.