Guilty Crown's 4-koma specials strip away the melodrama and just let the cast breathe in stupid, perfect moments. A handful of minutes where nobody's dying, nobody's scheming, just characters being awkward around each other in ways that land because you actually know them. It's the anime equivalent of flipping through a manga while waiting for something to start, except someone animated the jokes well enough that you don't want to skip ahead.
Guilty Crown: 4-koma Gekijou is a set of eleven comedy shorts from 2012, adapted from four-panel manga. They were released as bonus extras on the Guilty Crown DVDs and Blu-rays rather than broadcast on their own, which makes them a light comedic companion to the main series for anyone who owns the home video release.