Everyone notices that they each have an item missing, and Yotsuba decides that she will discover the culprit using her detective skills. While fixing dinner, Mami accidentally breaks a leg off of the music box, but hides the fact by making it look ok. Kaho comes by and bumps the music box, and when the leg falls off, she thinks she has broken it. Kaho tells Yotsuba and they take it to get fixed, but when they find out it will take a couple days, Yotsuba dresses up as the beautiful mysterious thief girl Clover and pretends to steal it to hide the fact that it's broken.