The description says "This follower needs [HS2 Race - VAM Race] as a front (a paid race made by a Chinese author)". The author doesn't know that you can't post mods that require a paid mod on nexus. There's no guarantee that the greedy pig will release his mod for free soon, but even if he does, the author of the follower should have waited for that release.
I think it was done this way: the author created the character in the race menu and exported .nif head along with .dds tint (this shouldn't be a problem for drm), then created the follower. But you still need that paid race mod, because the follower mod doesn't include .tri files for facial expressions and face textures.
