I haven't heard it. What's it even about, anyway?
In short, Nana brings the girls to the Usamin cafe that she works at, has them dress up, and offers lessons on being a good Usamin maid/waitress. Rin and Chieri are dressed like bunny maids, while Uzuki and Mio wear puppy ears.
The drama was 20 mins long, but it moved pretty fast. Rin played the straight man to everyone as usual, especially to Nana, while Uzuki and Mio were mostly just there for the ride. Chieri was the cute one that brought everyone together and made Rin lighten up and go along with Nana's crazy antics. So Chieri had a lot of moments where she would be all excited to see cute bunnies, then get depressed when Nana has to make up an excuse to cover for her Usamin identity, then happy again when Nana invites them to the maid cafe. And Rin was the only one who wasn't crazy about dressing in embarrassing clothing, but Chieri being all excited made it impossible for her to turn it down.
There's also an adorable moment of Rin/Chieri doing a moe moe kyun-esque version of serving milk tea, Usamin style.
