Mysterious Masquerade Ball

A couple receives an invitation to an exclusive masquerade ball in a grandiose mansion. The excitement starts upon the moment they start preparing their costumes - they tease one another with the possibilities hidden behind their masks.
They arrive at the grand mansion. Moving through the rooms, they playfully flirt, occasionally getting lost from each other and then finding each other again. Each separation and reconnection reignites their desire.
Later in the evening, they find a secluded spot, their strong attraction pulling them closer. Beneath the glow of the chandeliers, they whisper sweet nothings, their words filled with innuendo. The anticipation of what's to come amplifies their delight.

The couple should start by shopping online for exquisite masquerade costumes and masks. They can separately pick costumes for each other and later reveal them on the day. Try to pick something a little outside your partner's comfort zone to add a hint of excitement.
Set the scene at home. Transform your living room into an elegant ballroom. Candlelight, silk drapes, grand music playing in the background will perfect the ambience.
Plan a few party 'guests' - these can be stuffed toys or mannequins. It adds to the fantasy of the masquerade ball.

Remember, this scenario is all about adding a layer of mystery and anticipation. So play along - flirt, tease, but don't rush things. Keep your partner's preferences in mind when planning the scene and choosing the costumes.
Adding a special playlist filled with music suitable for a masquerade ball (classical, waltz, etc.) can heighten the mood.
Use some mystery-oriented phrases throughout your roleplay to enhance the theme. Phrases such as 'I wonder who's behind that mask?' or 'I couldn't resist your mysterious charm.' can amplify the aura of intrigue.