This is an older doujin game named Line-Kill Spirits.
It's a pretty simple and unremarkable fighting game, except you can only beat your opponent by taking pictures of their panties.
Use the PTConfig.exe to set your controls, but the combat is very basic. It's not too hard to figure out the special moves because they're very similar to classic Street Fighter 2 stuff. Figure out how to launch or trip up the enemy and get good panty shots!https://kissu.moe/qa/res/5036.html