Kenka Bakari Datta Konyakusha ga Ikinari Dekiaishitekimasu

"Just go ahead and call off our engagement!" Gina was betrothed at age 8 at the behest of her family. However she and her fiance, Carlo, have spent every waking moment with each other fighting. Despite Gina secretly harboring feelings for him. One fateful day, Gina tells him to just call the whole thing off and tries to run away from an unpleasant situation, however she ends up tripping and falling down a staircase which causes her to go unconscious. When she finally wakes up, and after a small misunderstanding, her family believe that she has amnesia, so Gina pretends to not remember asking Carlo to break off the engagement and everything from the past month. However, when Carlo does come to see her, he tells her, not about their engagement breaking up, but that he proposed and that she accepted. Now that he's seemingly all over her, where will their new relationship take them...?! (Source: MangaPlaza)