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Prompto getting sick of Lunoct skirting around their feelings for each other so he decides to do the classic ‘trap them in a lift until they admit their love’ plot
Prompto gets Gladio in on it because he knows Ignis would be against it. Gladio asks him if he knows what he’s doing and Prompto says the ever-so-trustworthy “I’ve seen it in the movies”
They stop the lift as planned and things seem to be going smoothly until the lift legitimately becomes stuck and Noct & Luna are trapped for real. Prompto calls up Ignis like “Hey listen Iggy you’re gonna laugh at this”. No one wants to know what he looks like right now.
MEANWHILE Noct & Luna are surprisingly cool with the situation. They’re just chilling in the lift and have no idea that the others are on the other side freaking out
The two of them sit & chat in the lift as time goes by, joking and laughing with each other and then… share a little kiss! An hour or so goes by and nothing happens (bros outside still freaking out) so Noct & Luna work together to get out themselves
By the time the bros fix the lift & get it open, they’re both gone and even MORE panic ensues. Noct & Luna appear behind them, wondering why everyone is freaking out. Prompto is like “OH LOOK THEYRE OKAY EVERYTHING’s OKAY HAHAHA LETS GO HOME”
Some time after, one of them let’s it slip that they kissed. Cue Prompto cheering “YES THE PLAN WORKED”. Noct & Luna figure out what he means and Noct is NOT happy. Gladio tells Prompto to run. The end!! 
This became way longer than I thought
