Don't Fall for the Enemy

Elsa Arendelle, Anna Arendelle, Rapunzel Corona, and Merida DunBroch work for an all girls agency called Light. Their agency rivals are this all boys agency called Dark. Jack Frost, Eugene Fittzbert, Hiccup Horrendous Haddock lll, and Krisstoff all work for the agency Dark.
What happens when the 4 girls and the 4 boys meet each other in London at a bar on karaoke night? What if later the 4 girls are contacted from the agency Light saying that they'll have to work with the agency Dark because they'll be staying at Light because dark was robbed. Read and find out.