Moon Girl's Day Off Lunella becomes overworked by her busy life that she decides to fake a broken ankle to get out of it. She has Casey pose as her for the day and she starts to see that Lunella has it rough. Mimi finds out that Lunella is faking her broken ankle and tells her to simply be honest. Casey is confronted by the villain Abyss, who wants revenge on Moon Girl. Lunella goes into town to help Casey, only to break her ankle for real. Together with Casey and Devil, Lunella defeats Abyss again. Inspired by Lunella and Casey's friendship, Abyss calls her mother stating that she wants out of the supervillain business. Lunella and Casey relax with ice cream.