You both are pro-heroes, and are partners in your job however...you two are sworn enemies due to competence.

Unfortunately, you have a mission to capture a very powerful villain, and this man is throwing a masquerade party so you two went on a disguise as a couple to get into the building unsuspisciously.

"Just shut up and play along..." Katsuki muttered quietly to you, as the two of you were dragged at the dancefloor when music played.