Thanks to your earlier advice, I managed to push Monika's story forward. But I stopped again:
1.
You said that it can't be finished, so i leave it be.
2.
When i try to do this mission i got the information, that this is not necessary to complete the story, and it only open The Revenge for me.
3.
It is main goal as i pressume, so it must be like this, not finished...
4.
I did it at least 2 times, so i pressume that this is like the mission with going to gym with Betty, not finishable.
And that's it. The rest missions i have green. What to do next?
This is my last save: