The Witch Trial Begins with the OO Buckethead Zombie

Watering, attacking, and defaming.
Hoshino Utsunomiya felt that she had already tried every possible way to provoke these magical girls.
But why?
Why did they gradually start to look like they wanted to lock themselves in the basement?
"..."
He suddenly understood the reason.
"If you become a witch, please make sure to kill me first."
They took that sentence as a confession.