Put a ship in my ask and I will tell you a bit about how each of the following scenarios would go down for them:
Fake dating
Bodyswap
Sexpollen/fuck or die/aliens made them do it
Dark!fic
Secret kinks
Their first kiss
Meeting the parents
Moving in together
A crossover of my choice
An au of my choice
If you like, another trope/scenario of your choice

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Rule number one: nothing is what it seems.

It’s the first rule you learn in the world of espionage. What you see is never what you get. You scratch the surface and peel the layers. Making an assumption about someone – a mark, a contact, a fellow agent – is the worst mistake one could ever make. You might as well dive headfirst to your death.

He thinks it’s appropriate that it’s the first rule he breaks the first time he meets James Bond.

"Illusions aren't worthless. They're at the heart of most relationships
(Adelle DeWitt, 1.10 - Haunted)

“Ma’am, do you have an exit strategy? We have a handler abusing an active, Federal Agent interrupting an engagement, spilling his guts to the nearest civilian. I take much of that as my responsibility. But the higher ups will target you if this all goes south.” (1.06 Man on the Street)

“What? Did you think I’d show you mercy? Or rage? Three years by my side… I’d think you’d know me better than that.” (1.09 A Spy in the House of Love)

“I’d rather die.”
“Well, I’d rather you didn’t”
(2.11 Getting Closer)