i had to delete the post since i almost forgot what I've done to make it work, so I'll make it again
step 1, extract the game, and open it, it will crash,
step 2 open the %locallow% => "myosuki" => Girls! Girls! Girls! and then the "txt file" called "player"
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all of that is the errors that the launcher found before crashing, there's some missing files
step 3 you'l need to copy (do not "ctrl + X" just copy paste) the "MonoBleedingEdge"
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into the "Girls! Girls! Girls!_Data" folder ( pay attention since there's 2 folder with the same name there, we are looking for the one with the punctioation marks)
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now you have the full path but, you need to find the files that it isn't in the folder, in the "Girls! Girls! Girls!_Data" there is a folder called "plugins" that contain another folder called "X86_64" with the "steam_api64"
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copy and paste in the "MonoBleedingEdge" folder in the ""Girls! Girls! Girls!_Data"" and where you got it in the launcher folder (yes you'l have two monobleeding edge folders, but that's the only way I made it work)
step 4 (OPTIONAL MAYBE, I DON'T REALLY KNOW) there's a file called libsteam_api64 i couldn't find it anywhere in the game files, I searched and downloaded from (if I remember correctly is) githud, i dont know if it is safe or not, it havent done any damage on my pc and I tracked every process it could have been involved but, the file was like a "good for nothing im there" it (probably) works without it but IF you cant get it to work, maybe you'll have to download (at your own risk), mine ends with .SO and not .DLL, this is what i've done to make it work, hope it works for everyone
there's a guy that uploaded the updated version it seems, but just in case i'll let this here if someday someone needs this or IDK :3
(if there's some errors in my grammar, i'm sorry english's not my first language ^^)
(edit 1) i've forgot to show the file so here it is
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this is how my files are right now