It's a common misconception that isekais are power fantasies about being strong and getting bitches. I mean, it's true for some. But generally speaking, isekais fulfill a much different power fantasy: that of starting over. The fantasy of being free of your reputation, your mistakes, your previous attachments, so you can be free to rebuild yourself in a world where no one has ever known you. (If this paragraph caught your attention, I've written quite a bit about isekais over there.)
The Little Tail Bronx serie (ie. Tail Concerto, Solatorobo, and Fuga: Melodies of Steel 1 & 2) are not isekais. However, they're still very much about the desire to start over. As you learn in Solatorobo, a key piece of worldbuilding in this serie is that the furry mechapunk game actually takes place in our world; specifically, in a bad future where humans fucked up so bad it was eventually decided to hit the hard reset button on the world (read: kill every living creature) so that hopefully, millenias in the future, a new humanity could rise. One that isn't beholden to the old world's legacy, one who would know nothing of our bloody history and wouldn't have to keep dealing with consequences from choices some guy made 200 years ago. Wouldn't that be nice? What would happen, if you could just start over?
Every single game in this serie proceeds to respond to that question with "it does not matter, because you can't start over, you stupid fuck." All four games I have previously mentioned deal with a plot thread along the lines of "someone discovered an ancient superweapons and is about to cause problems with it." Because it doesn't matter how hard you clean up that slate, how many people you kill and how much of the earth you break apart- the nature of time is that you can't just pretend it's not here. Even if you kill every last witness in that forest, that tree still made a sound as it fell. Things remain is my point. A stray log. A legend. A robot. A grudge. There is always something that remains. It is both foolish and cowardly to try to run from the consequences of your actions by resetting the world. You were never going to get that. Millenias later, children who have nothing in common with you will still get blood on their hands because of you.