I can't use the Lust Power anymore and that blocks the main quest. I had version 16 but didn't reach the end in that version yet. Then I downloaded 19 recently and now I might have to reset all my progress due to this.
You're right, I missed it. Maria is only there in the evening, but I can train with her so I think this one is solved. Thanks for the quick response! But I can only train with Maria. If I bathe with the rescued girls in the morning at the refuge, I don't receive any points. Training with Maria works though. I play on Hard. A Night Bath.