CoreCore is the term that is associated with a particular practice of film-making (read arranging moving-images) that has emerged through social media apps like TikTok. Taking its name from the -corification of aesthetics in the Tumblr-era (fairycore, cottagecore), CoreCore usually involves, as Louis Morelle writes in the book, images concatenated against each other. Lucas Ferraço Nassif theorized that, like the Japanese concept of Ma, something jumps out from the gaps in-between images: "CoreCore is two words, but its the same word, and there is a mirror-stage between the two cores: who is going to confirm what the core is?".

This book brings together artists and theorists who were either part of the movement, or fans of the movement, close to it, and so on, to create an anthology which explores the movement on its own terms, and ensures that no academic can ever discuss CoreCore without citing this book, and thus ensuring the underground their place in the discussion.