Mangas where the MC doesn't give a shit about anyone but himself are so rare these days. I feel like he could be progressing so much more if he didn't take this detour for 2 people he barely knows.
There was literally no need for that pronoun game at the beginning of the chapter if the character was going to explain what "that" was in the same chapter; the antagonist could have just said the name of the item.
"Don't move!"
And thus the MC's rampage is stopped, obediently standing still like a child caught with his hand in the cookie jar.
That's it, story's over, we're done here.
These characters are too irrational. It was stupid as fuck for the duo to attack this group head-on. They brazenly made an enemy out of them when there was a chance for them not to have been targeted at all. There were so many ways to go about it and they made the dumbest choice.