On Wednesday, the official YouTube channel for Animelo Summer Live concerts began streaming an anime short video featuring Northern White-faced Owl and Eurasian Eagle-Owl gathering friends to clean up Saitama Super Arena, the real-life venue of the event. The friends discovered cards that taught proper behavior during the concert, such as not using electronic devices ("What's a mobile?" "Doesn't look very tasty."). However, they were surprised by the large number of attendees (far exceeding their estimate of 100), and quickly fled.