@Ringz it’s censored in all the panels.
Theory 1.) He has a raging boner every time he thinks about killing or being killed.
Theory 2.) His dong is too massive to be shown in a manga.
Theory 3.) He has a hole in his pants and no underwear.
I wouldn’t say they look meaner as much as more grown up,
In the original they kind of look like elementary kids while here they really look like teens