The seinen demographic tag is misleading. The story isn't deep, and the political aspects that emerge are comical. The general commentary on nuclear power is fear-mongering and detached from reality. In other words, it has a very childish perspective on the world, which extends to human interactions.
If you've seen Dragonball then you can expect that quality of writing sans the pervy jokes. The entire manga is available in EN elsewhere, but I can't say that it's worth a read.