Painted and voiced very qualitatively and stylishly. Just a reference representative of classical fiction in anime. However, the plot is not so smooth.
The plot is also a reference representative of moralistic cinema of the 80s, where under a naive and uncomplicated plot full of conventions, the viewer is trying to drill into some obvious and worn-out morality. After all, in another area of the cosmos (or, consider, the world of the future), people with dirty thoughts will not be allowed to pass.
The overall impression is average.