Keep playing and don't be afraid to try different paths.
Already tried.
This scene requires the protagonist and Aiden to have a less intimate relationship before going to the principal to discuss Aiden's issues which can trigger it
Is there a guide?
In general, as long as you choose an option that does not involve your relationship with each other, it is sufficient
For example, not drinking alcohol, blaming him, and so on
You can try this way