The Upgrade is a "jeepform," a type of improvisational LARP developed in Scandinavia.
The backdrop is that "The Upgrade" is a reality TV show; two players take the role of the show's producers, while the others are divided into "couples" who have been invited onto the show. Each couple is split up, and each matched with someone from another couple. The conceit is that, at the end of several episodes, every player will announce whether he or she wishes to stick with his original romantic partner, or "upgrade" to the person with whom he or she was paired during the show.
The game uses several techniques common to jeepforms, including "inside outsides" (character monologs), presaging and post-saging (other players seizing the action and playing out either a past event for one of the characters or a potential future event, with the main player of the character then required to modify his or her conception ofthe character accordingly), etc. It is played in "episodes," beginning with the producers and participants talking about "tonight's show" and what "the audience" is about to see, then improvising events that were filmed and presented to the broadcast audience.
As is typical with jeepforms, it places a strong premium on eager improvisational roleplay, with the "producers" shaping the experience but not with as much authority as conventional GMs, and can result in much hilarity.