I kinda didnt reeeeally like the end at first but tbh, I think thats more me then the manga.
It feels a bit like it was a deus ex machina ending, but it makes sense for them both to be transfered together as they are kinnda famous in their workplace.
I wonder if they would marry if the story was set in germany, as it saves a lot of taxes. I mean, they already plan on living together for a long time and basicly proposed to each other (even though it was a goodbye)