someone can tell me how unlock the scene in after party where the main character and julian cooperate to fuck ron i try all routes but i could not unlock this scene that i found in game files

Try this (have not yet tried it myself)

• make Ron drunk
• your relationship with Julian has to be > 0
• your relationship with Ron has to be < -3

mh, sad... okay, I made some notes, because its a special scene and its tricky

Start: "Engineering" as major

Meet your Roommate: Joke

Headmsters office: choices dont matter, I guess

Ned:  Cooperate in Library, Visit him and go with him. "I am Dr. Evil",  "not realy", "Maybe another time". In Class: be mean to Ned. In Lockerroom: be submissive in all choices

Visit the Headmaster:  be submissive in all choices

Got to your Rook (Talk with Ron and Julian): "Kick him out", "Skip it", "About me", "What happened?", "Dont tell him", "Hug him", "Ignore Him", "true","Sorry","no","For god","Skip"

Meet at cafe: "Encourage him", "For now", "Do not flirt",  "Leave", "Consentual"

Party: First go to Julian and be nice to him. Then go to Ron: "Make him drink", "Alcohol"

Leave Party, come back home: Webcam doesnt matter, i guess. "Leave them", "join them"

Now I got it, thanks a lot man. I had been wanting to understand the context of the images for a while.