No-bookable First class on 747-8 for flight, upgrade only?
Flying in a few days on LH 754 from FRA to BLR on a 747-8. When I booked a few weeks ago, I assumed that it was a standard 747-400 so it didn't even occur to me to look for First class. However, when I just looked it's not a -400, it's a -8 and it has first class seats (the usual 8 seats at the nose). They appear to only be available as an upgrade (for relatively speaking dirt cheap price of around $750) and are not directly bookable.
Will this be "official" first class or just a first class seat with business class service and amenities, including lounge access? I'm confused.