Uniform Stealing Board

In this anime, a young woman plots to escape from a mansion. She asks the head maid to bring her some maids who are about her size, and then selects one from the group as her personal assistant. That night, she knocks out the maid, then uses some magic and potions to steal her uniform and identity, and makes her escape.

Starts at 19 minutes.

https://9animetv.to/watch/i-shall-survi ... ?ep=107914

Loved the soft little "mmm" she lets out while being chloroformed. Nice find.