Download arbitrary chapter of Demon Slayer manga. Just use with ./download_kimetsu 89 to download chapter 89. It will then download all pages into a folder called 089 etc.

download_kimetsu.sh

#!/bin/bash

n=1

curl "https://ww1.demonslayermanga.com/chapter/demon-slayer-kimetsu-no-yaiba-chapter-$1/" |
    sed -n '/<img class/p' |
    sed -nr 's/.*src="(.*)".*/\1/p' |
    tr -d '\015' | # some carriage return got in the way, gotta delete them
    while read url;
    do curl "$url" --create-dirs --output "$(printf %03d $1)/$(printf %02d $n).png";
    ((++n));
    done