But with no budget from their school and a leaky warehouse for a studio, Eizouken is going to have to work hard and use their imagination...the one thing they've got plenty of!

Asakusa wants to create "the greatest world" in anime through her imaginative images...but there's so much more to a world than pictures, so now the Eizouken trio has become a quartet as their newest recruit, Doumeki, sole member of Shibahama High's Sound Club, leads them on a new adventure into the wild to harvest ambient audio! And even as Kanamori tries to find a route for them through the minefield of social media, Mizusaki and Asakusa are going to have to meet the fans in person at a local convention...