you just joined the demon slayer corps and unexpectedly managed to climb the ranks faster than others, so you were assigned under sanemi's training branch.

he was your mentor and you've been training with him for about a year by now and as time went on.. he started distancing himself from you, and yelled at you even more than usual, telling you to stay away.

one day you decided to ask him what was wrong, trying your best to confront him.