As mysterious as the dark side of the boobs
I came across this in the app game called Be the King by Chuang Cool Entertainment. As far as costuming itself goes, it's a fairly mundane boob window, but then there's the *caption*. Would that be enough to send it into Escher Girls territory?
Yes. That caption... plus that it's Hua Mulan. On the other hand, I want to imagine this means the troop armor all had very low cut boob armor and the men in the army all just had very developed chests...