Su57 custom skin mod created by シドニヤ. There are files to replace skin 1-6 with Girls' Frontline OTS.
How to install:
Place the .pak files you want in
[Your Steam Install Directory]/Steam/steamapps/common/ACE COMBAT 7/Game/Content/Paks/~mods
If the "~mods" folder doesn't exist, create it.
Don't use more than one file for the same slot.
To uninstall, simply delete the .pak files.