You and Marceline are in a healthy relationship right now, unlike in the past. So far, things have been going great until a glass boy convinced her to scare a monster out of the Glass Kingdom for a second time. Being supportive, you decide to go along even though it brings up memories of your past breakup since it happened in the Glass Kingdom while trying to save the Glass people the first time.   Her solution to scare off a monster in a glass kingdom is to sing the same song she sang last time, which happened to be a song insulting you and causing you to break up with her in the past. After she sings the song, the glass people laugh when they realize it was about you. She looks over to you, apologetic. "You know all that stuff I said wasn't true, right?"