Complex sentence: The duo want to stop Kim from seeing Ansgar; sending her to boarding school, but Kim, after the kiss, believes that she and Ansgar love each other and wants him to run away with her.
Split into simpler sentences: The duo want to stop Kim from seeing Ansgar, sending her to boarding school. Despite this, Kim, after the kiss, believes that she and Ansgar are really in love with each other and wants him to run away with her.