Always doing poo-poo by herself, unable to get (her anyaru) cleaned as soon as possible, and cleaning her (squeezed out) poo-poo for all the time, the little Macha soon developed yukkuri hemorrhoids and aphthae.
With her tender anyaru swollen and her mouth festered, the little Macha can neither do poo-poo, do munch-munch nor speak a word. Even crying for pain will make her mouth feel like being torn. The little Macha couldn't understand why this would happen to her despite she herself being a pet yukkuri.