After School Gold Rush (K-ON!) [Colorized]

A casual walk home from school spirals into a frantic race against biology when the K-ON! girls are all struck by sudden, urgent stomach trouble with no bathroom in sight. Yui loses the battle first, squatting outdoors in front of her mortified friends, while Mugi and Azusa follow suit in the bushes before Azusa barely reaches a public stall, leaving poor Mio to suffer an accident in her uniform. The punchline lands with their teacher Sawako, back at school on the toilet and regretting the expired milk that doomed them all.