attaching links for pictures always helps, but as far as I know of MM her outfit in this case is more like a bustier with extensions to make it more like a jacket, if you start with it as a bustier/strapless dress rather than a jacket, it will end up being a lot easier
Anime USA 2015...Halloween!
Yuri Kuma Arashi- Kureha Bear Form
Evangelion- Asuka Langley Soryu Yellow Sunddress
Magic Night Raye Earth- Ferio Yellow Shirt Version
Artist's Alley Hopeful....We'll See
Wondercon 2016...End of March
Marvel Comics- Scarlet Witch Original Design Version
Deadpool/X-men Comics- Siryn...not sure which version yet...
DC Comics- Raven Either Teen Titans or Original Comics version....