It's reverse in the sense that it's typically the primary male being cukolded, i.e., the cuckolded is the primary partner, the cuckolder is the third party - in this case, he's seeking to join and established relationship as a cuckoldee.
Whew, it is kinda hard to describe. In a sense, it isn't cuckolding at all, since the word usually applies to people in an established relationship, one of whom is getting sex outside the relationship with the compliance of the other - this is more like a service submissive who want's to be taunted and denied sex with whatever partner he's presumably attracted to.
It is however, pretty much a cuckolding dynamic, for all practical purposes, so I won't quibble with the choice of phrasing, although you might want to find a better way to explain it.
i.e., it could be seen as a form of service/worship.