It would seem at the start of Pandora's Box 2, the "good ending" for Pandora's Box 1 is marrying and going to jail. At the time, and even now, I don't think that's a good ending! Endings are about feel satisfied that all your decisions/actions have come to fruition, not fallen apart!
Nice. I appreciate accurate descriptions. For the foot lovers out there it might even help to spell it out for them.
The critique I would have, is the corruption mechanic.
If you miss one of the first two scenes, you can never watch any corruption scene for the rest of the game, since you will always have to use the non corrupt choice and that will give negative points. I had like -40 in one skip playthrough after the first playthrough.
And for the lesbian threesome I did not manage to find a path that ommits the glory hole event and other stuff, due to negative points for non corrupt choices. There is one that narrowly does avoid the glory hole, but you have to basically do all the other corrupt stuff including the landlord, the casual sex on toilet, and seducing the clothing shop guy. (and of course, the lesbian threesome included a foot scene as well ;-b . )
There are no good or bad endings in pb1. There is one end of game state, that has the couple still being a couple and thus a tie in to a sequel. The other "endings" have them split and the results of a few months later shown.
As for decisions in pb1, there are actually none. It is illusion of choice.
Art was fine and story captivating enough, but I stopped caring after being railroaded too much. Escpecially the blackmailing stuff. It is not a choice, if you are presented with "do the thing" and "do the thing but be angry". And your only reward for not going along with the railroading is, that you will be locked out of chosing any further juicy actions, because that corruption mechanic is terribly implemented.