The Golden Butterfly takes Revenge

Vivian wants to become a star so badly that she's even willing to become Lupin's victim if it'll make her famous, but a slip of the tongue causes her to say "Lupin stole a cat that eats pencil shavings." Lupin, infuriated at the grade-school newspaper report, begins a search for the cat in question, feeling disgraced at having been accused of stealing…

Synopsis excerpt via Kitsu.