Well... Fuck. Feels like there's more that could have been shown, yet at the same time what else is there to see? A story needs a semblance of conflict to persist (not even a conflict between people, but a goal to achieve or an obstacle to overcome) and really... Who wants to see these two have to deal with any kind of struggle?
Maybe that's the point of it. I dunno if there's more to the LN/WN or not, but this is as good a point for a "happily ever after" as any.