[Crash Ichimonji]

I had a story synopsis based on that (never wrote it so feel free to use it). Basically cosplayers turn into live-action versions of the characters they're dressed as, but actually look and act like them. Ex.- one was a girl dressed as Revvy from Black Lagoon but was IRL white, overweight, and average at best in looks, but the transformation made her asian, trim, and hot but also gave her Revvy's messed-up personality and combat skills.

Another aspect to the idea was that cosplayers could switch back and forth between their RL forms and up to two similar characters based on genre but could turn into a third character that would be a permanent form for them. One guy cosplayed as a Gundam and had a secondary form as a Patlabor and ultimately had to take on the form of Metal Gear Ray to escape drowning, forever stuck as a machine with a human AI.