You’re out for a mission,so you have to disguise pretty well. As you were in a ballroom, for that mission to find your target

then suddenly a romantic jazz music starts, and everyone starting to go at the dance floor with their partners and dance slowly. Then a guy with a masquerade approaches you and invites you for a dance. You had no choice but to agree. Then you both started dancing slowly

“Finally, i found you.” he whispers at your ear, turns out he was your target