Crong gets in big trouble with Pororo for making the house messy and for scribbling on the floor. Crong had promised to help with the cleaning, but he’s being as lazy as ever. After cleaning diligently, Pororo goes to the bathroom. Just then, his friends come to visit. They see Crong holding a mop and think that Crong had done all the cleaning and they praise him. Crong feels good when he hears his friends unexpectedly call him a ‘Master Cleaner’.