Help finding manga/manhua

Sorry i only know a specific scene and i believe it revolves around a noble purple haired fl who is engaged to a prince(?). the scene is basically in a blown up room with a huge hole, and happens when the fl “injures” the villainess and her powers go berserk because the ml happens to see the scene in front of him and she’s scared he thinks that she injured the villainess so in the end she falls out of the hole falling into the ocean and ml jumps after her. My memory of the story is not that accurate but I’ve been searching for this manga for 3 hours and i’m desperate.