It seems using only the kind options in the demo, being affectionate and interested in Khol makes the game bug. I had twice the aperon dream, despite discovering the notebook on the second day (and expecting maybe a doctor-related dream ? I dunno), and when I invited Khol to lay down with me at night the interaction was exactly the same as the day before. When I woke up, he was again surprised that I remembered his name. I felt like in a weird loop. I was also given the option to ask again stuff I already asked the day before (about the aperon).