I'm pretty sure that everyone already knows by now that this relation starts off as a "facade for peace" sort of thing, but in the later chapters we start to see that, that might not be the case anymore, as euda starts to develop feelings fpr johanne. the story starts to pick up around the end of volume one into the beginning of volume 2.

We finally get some dramatic plot around the end of volume one into the beginning of volume 2; where they peace couple try to keep their engagement all while trying to thwort the plans the people (which consists of a terrorist group johanne previously capured, his older brother who fears his brothers influence over the nation, and more people yet to come) hell--bent on taking johanne down.

IF you continue to to read on you'll find that the relationship between euda and johanne starts to grow and what will piss you off the most is how many times they will ALMOST KISS... but if you can hold out long enough they finally do in volume 3...

Sp far it seems to be a touching story and i plan on following this manga al the way to the end, and i hope others will too...