It's been a very long time, if ever, that she has looked at a man other than through a targeting scope. It feels strange and oddly liberating.

Across the dimensions, across the realms, across time they will meet, these so-called not-lovers. Drawn to one another in life forever but never together, to be united only in death.

Everything changed in Budapest, but nothing changed at all. Black Widow/Hawkeye

Clint and Natasha in the hours immediately after shawarma.

Clint had been hesitant with their relationship, backing up emotionally and throwing up the walls any time it seemed to be getting serious, but as she lay tucked under his arm, she thought she'd like it if they got serious.

Natasha remembers letting go. She remembers falling, endlessly, the jagged black rocks rising to meet her. And then, nothing – until the moment her eyes and her mind opened to the golden glow.

They were Strike Team Delta long before S.H.I.E.L.D stepped in. Natasha and Clint, and how they became two of the world's most deadly assassins.

The first time Natasha Romanoff learns of Clint Barton's existence is when he almost kills her. The beginning, and what came after.

He falls in love with her and she falls in love with him and not necessarily in that order.

Clint/Natasha fan fiction, from origin story to the end of the first Avengers film.