It's a story about a two-sided love and they both want to teach eachother about their homelands. They are happily married and nobody in the manga does even care! I loved this manga (〜￣△￣)〜
I want to see this with Rin and Sousuke PLEASE ლ(´ڡ`ლ)
Link to englisch Rin x Sousuke: http://myreadingmanga.info/karaage-of-the-year-karaage-muchio-tanetuke-sr-mating-sr-free-dj-eng/
Finally found it guys! ლ(´ڡ`ლ)