This story is a record of that cruel fate...The immortal who saw the death of the universeEven the sun is nearing the end of its life....And then,"What of the undying life-form that has been thrown into space?"Final Part.
Apparently, according to WWWJDIC, this "final" has the sense of "demise", and is also used in the term 宇宙の終焉: the end of the universe. Can't figure out how to make it sound nice.