Anything that has to do with someone dressing as the other biological gender. Again, mostly male ⇒ female, but could include the reverse as well.
Menach's Boys School & the Royal School of Ballet by D3_M
This is a really long and old story from the author D3_M, that I managed to find in an archive of sticky-site.com. Menach’s Boys School & the Royal School of Ballet by D3_M “Settle down class” boomed the voice of the headmistress as she entered the room. “Due to your previous art teacher leaving last term we, have found a new art teacher for you.” ...