The Bounce-bounce Girl
After being tricked by Kokoro with more false hopes of retrieving their Toys, Milky Holmes end up catching colds. Henriette spends the night nursing them back to help and ends up catching a cold herself. Milky Holmes decide to help nurse her back to health, and upon changing her clothes find her Arséne disguise, though they quickly pass it off as cosplay. Sherlock gives Henriette a rather dubious medicine that causes her Toys to go berserk, trapping everyone within a strange Momotaro-inspired illusion.
Aired 25/11/2010EP 8 - The Bounce-bounce Girl
Detective Opera Milky Holmes
"Sheryl, Nero, Elly, and Cordelia are the most popular students at Holmes Detective Academy, because of the many cases they've solved with their Toys and teamwork. The students and the people of the Detective City Yokohama all look up to the members of "Milky Holmes", as they're called. But on a dark and stormy night, during a battle with their rivals "The Gentlemen Thief Empire", they lose their toys, and their fate undergoes a dramatic change..."
(Source: Crunchyroll)