What script is the ukdevilz using?

Looking for adult script that ukdevilz is using, it's clean, no-fuss and fast. If it's a self-made one then is there any cms out there is able to create a similar one? I wonder if there's any new contender as kvs, wp-script, and mechbunny have been the top choices for awhile now

Ukdevilz’s script is known for being lightweight and straightforward, but as far as I know, it’s custom-built.