>>13524Nhentai is also structured similarly to old mangadex, so the images are easy to rip with something like this script, where you need to specify the number of pages and the url of the first image:
#!/bin/sh
if [ $# != 2 ]; then
echo Usage: $0 n addr >&2
exit 1
fi
f=`echo $2|sed 's/1\....$//'`
for i in `seq 1 $1`; do
wget $f$i.jpg
wget $f$i.png
done