How to make openvpn use ipv6 externally and ipv4 internally?

Hi, is it possible to make OpenVPN server to communicate to websites using ipv6 by default, while connected to client using ipv4?
Im trying to do this but I cant find any (at least understandable) guide. I have both /64 ipv6 and ipv4 on server and only ipv4 on my PC.

To make it simpler, here the pic to describe what I looking for:

I currently have TUN VPN working in ipv4 (OpenVPN 2.6, openSUSE 13.1), so what modification/adjustment do I need to make this happen?