While not the most technically luminous work of the period, Fukusuke compensates for its simplistic animation style, plain and empty background frames and repeated use of motion frames with a brilliant piece of speculation fiction as the driving narrative. The anime is about a frog who was born different in how gravity affects it - and the trials and tribulations that it has to go through to finally reach closure with its natural disposition. This is by far one of the most unique stories I've seen in animation from the era, especially given how hard it leans into speculative elements and extrapolates the premise into abroader consequences. I see clear parallels between the main character's "nature" and allegories to unconventional sexualities. The parents trying to "fix" the child frog's condition by trying every trick in the book parallels how a lot of parents often come to terms with the fact that their children do not align with the then gender or sexuality norms. They try different methods to get the frog to behave "normally" which only creates difficulty for the frog until it eventually ends up on an adventure.