1. Uninstall the game, then Go to game local files, delete All (path: steamapps\common\The NOexistenceN of you AND me\) (Uninstall and Delete All)

2. Press Win+R and type "%APPDATA%

3. Find "RenPy" folder

4. In "RenPy" folder find \The NOexistenceN of you AND me-'s folder and then delete it.
(if It doesn’t appear it does not exist, or maybe exist in ours?)

5. Press Win+R and type "%Temp% delete all.

NOW - RESTART PC - install game and we have to play it again :P

6. IT will work! No worries, we will be guided...

After the cake falls, stay silent (select: "......")
Then select "It's not Lilith’s fault it´s all my fault." -
Then again “I couldn´t hold the cake..." and… “So it’s my fault, it’s all my fault, all my fault, all my fault…”
Again “all fault, all my fault, all my fault” then all my fault and goes on…for last select … (there´s only that option xD) for last select: -mmm I understand-
Then select: I enjoyed making the cake…
Then Does nothing and silently begins cleaning up

Defeat The Demon Lord and speak with Lilith, choose that (the game is boring, weird premise, cheesy dialogue)

Then (yes it´s absolutely boring), go on and go on with the unique responses,

Then choose "I’m sorry, I´m sorry I´m sorry…"
Then again “sorry, sorry, sorry” – “I understand you”

You should get The final 7 bad ending it says... the morphean paradox successfully convinced the princes…. Etc.

So, we are doing great :D

Get: Expert Negociator

In the Ferris Wheel, choose "I feel like I'm never welcome, that no matter how hard I try, I can never meet anyone's expectations."

– After the concert (such an amazing perform HellYeah!)
Select: “It’s too terrifying I can´t do it” - “Feeling a bit dizzy” –

When Lights out, select: "....” “I´m scared, I can´t do it. I´ll die…”- “I would rather Die than do something like this” – “...”- “takes Lilith’s hand”