2 Scrollers / Columns on Hover with Text and Images like on milakostiana.com

This website milakostiana.com has fixed resolution, no scrolling.
But when hovered on columns [at the right side + in the middle column] we can scroll up/down only when hovered at this slider colomns. Is it required custom code?

yes this is possible with custom code. or maybe achievable also with iframe embedding and a bit of css. But its a bit tricky if you are not familiar with code.