After being stuck on "Good News?" for the last 3 updates, i finally found what was missing.
I need to talk to Ryokoin the morning, there'is the option to go with her to see Natsuki.
Then i visit Natsuki in the evening.
After sleep 2 days (don't know why 2) it triggered the next step.
Why this is not mentioned anywhere is beyond me, i was very close of giving up the game completely.
This really need to be fixed so the proper hint can be displayed.