Miss Kobayashi's Dragon Maid Vol. 12 (manga)

Telne, an ancient and powerful harmony dragon, has arranged for Elma to return to the dragon world and enter a political marriage. While Elma herself is agreeable, Kobayashi and Tohru are unable to accept it, and they find themselves re-evaluating everything they thought they understood. When a dragon and a human put their heads together, what kind of answer will they find?