I was going to ironically ask if the title was talking about a character's pants, but description implies that is exactly what is happening. So its not fun anymore.
I gave up at the "it doesn't matter, he was the weakest of us!"
They are all going to die, one by one. Without even realizing that the guy killing them might be a threat.
How does she hold her hands like that in front of her with the guy gripping like that? It looks like he isn't exerting any pressure at all, but that means she should fall down...
Edit: looks like the artist... Uh... "Fixes" it for ch 19.