@Scrabbleman
That’s a big part of what the show did well. Just about all of the exposition was a gradual “show don’t tell” throughout the series.
To get more specific:
||At the start, things look like a mostly normal safari park (except for the animal girls and some weird monster enemies). As they progress through the areas of the park, they start encountering some odd elements: overgrown paths, broken bridges, a park tour bus rusting in the jungle, a cable car line covered in rust and vines, an empty cafe, and absolutely no people.
And then there’s the oddly melancholy end credits. No one on screen comments on any of this. As far as they know, this is just their happy little world of “Friends,” with the only odd thing being the amnesiac main character, Kaban.
Further on, they drive through a collapsed highway tunnel (again no one comments) and encounter a sort-of archeologist Friend in an odd underground structure, which turns out to be an abandoned maze attraction. As they leave her and continue onward, she looks at Kaban and comments to herself “I guess they weren’t all annihilated, huh?” which is the only time anyone comes close to explaining what happened. Throughout the rest of the series they continue to encounter park infrastructure in various stages of disrepair, and by the climax you can even see crashed bombers in the background (still no commentary or exposition). The epilogue is probably the most visually post-apocalyptic, with the characters on and around a bunch of decayed amusement park rides.
For KF2, the cat’s already out of the bag, so even the first scene looks like a cuter version of Fallout. ||