Definitely a Tear Jerker
focused on the human element of the series — the history of East Germany is there as a foundation, but it's Prussia's personality that really drives this fic. In another light, it's an excellent take on the division of Germany, interpretations of which vary in the fandom (although Prussia!GDR might well be on his way to becoming part of fanon
). No romance, but a wonderful brotherly relationship between Prussia and Germany.