No matter what.. Nobody will feel never truly satisfied. We'll always be looking for more. Maybe that's the point. It's a manga where everything is seemingly futile, but maybe that is the part that is satisfying. Good ending. Bad ending, or bitter sweet. There is a struggle regardless between moment of cool and working some clarity.
It is a narrative on the struggle against inevitability of life, death, and the pains/joys in between; and even the struggle of our human condition in of itself. We seek more. We seek not just comfort but struggle. Whether it is a war, or seeking knowledge outside of our current understandings.
https://www.youtube.com/watch?v=f8FAnbz_BVA&list=RDf8FAnbz_BVA