I don't know friend, the file was complete and that was the correct order of the pages and pics.
It gives me the impression that they are files extracted from a game and that they correspond to some type of numbering that allows playability.
Yes, you are right, it came from the game A Perfect Marriage by[Mr. Palmer], in version 0.7.6. (Lastest upate from 2026-09-25).
And the parts you published are not complete, game goes up part 7, with the lastest picture: p7_9_16.png.
After the lastest picture of your ending part 5/21 with: p4_14_44.jpg.
There is still 969 pictures/animations to finish the game.
The full game is 3'700 pictures/animations.