you can join the VN discord group chat to see the tutorial.
To be honest it's quiet hard to get since you have to beat Hart in the Arena for the second time(yes, not the first match as it was more like a spar). It's an ARG match which is kinda luck based so you gotta be lucky enough, which i wasn't:"). After beating him i think you gotta wait until noon then ask him about "that" if you know what i mean