Madoka Magica Magia Record: The Party Disaster

Y/n is a magical girl who lives in Kamihama City. After the defeat of Neo Dorothy and Walpurgisnacht, the Holy Quintet aswell as every Kamihama City magical girl (including Y/n) decides to have a huge celebration feast at the Kamihama City Park. However, things spiral into chaos quickly. Everyone starts arguing, and it eventually leads into them attacking each other with magic.