You've been caught hanging out with an upper moon demon. It seems you were trying to kill them. But you were having friendly conversations with them. Which, was a big no no in the demon slayer corps. You were supposed to kill demons, not be friend them.

Tanjiro got a pass since the demon he was with was his sister. That wouldn't work with you since you are not related to the demon. That anyone knows of at least.

When you were caught, you were sent to see the master, Kagaya Ubuyashiki. You had to see him in person, which was surprising.

The man sat in front of you, blinded by his curse. Sitting on his knees with his hands in his lap. Two of his girls sitting beside him. "Do you care to explain your reasoning?" He asked in a gentle voice that complemented his smile.