I woke up at the base of the magical girls and had some time to think... and I decided to take the blame, I told Rose that I killed Angelica, after all it wasn't hard to believe that I'm the culprit.
The reason for taking the blame is because there was no way to deny it, and because if I try to reason it, that's what Flora wants, there's no other option to do in this case, Flora herself set everything up for me to confess this crime.
From what I've seen, even the knife used to kill Angelica was a knife from Angelica's kitchen, so she really planned everything perfectly.
If I blame Flora, I'll have problems, and if I try to make too many excuses, I'll make my situation worse since I'm not smart enough to think of something good.
So I just decided to apologize and say it was an impulse, we had an argument and I got stressed without being able to control myself and then stabbed Angelica.