I think the most confusing thing about this game is for those players who haven't played QSP games, including the first game in this series.
The mains thing to note is that you are grinding towards some stat with the girls all of the time. So when the game hint says to Listen to Lola at the pool, it means do that a ton until all of the girls' corruption stat is high enough. I'm not sure the number, but cheating it to 100 works in this case. Everything is like that. You'll probably have to do each step a bunch of times to raise whatever stat is being looked for enough.
The other thing that is events have very specific times/locations, often including a day of the week. So when the hint says to give Foxy the lingerie, it wants you to do so at a specific time and/or location. In her room, in this case; not sure if there is also an exact time for this one. You can't give it to her when you see her in the kitchen or elsewhere. The game has a specific (possibly stupid) plan and it will only let you interact when it wants you to (when there is a little portrait in the corner, for example).
Basically, they brought all of the bullshit from Russian QSP games into RenPy.
Most people probably shouldn't play this until it is much further along and someone has done a walkthrough or modded it. Personally, I find QSP games much easier to mod than Renpy (though Renpy is easier to cheat in with the built-in console), so I'm not sure how quickly anyone will be jumping on to do a proper mod of this insanity.