Coffee, Humanities, and the Russian Army (смешанная)

History professor Bucky has a crush on the new Ethics professor, and the two of them start seeking every opportunity to flirt and tease each other, but neither is sure if the other wants something serious. Natasha and Clint take it upon themselves to 'help'. 60% Sass, 30% Fluff, and 10% Hot Grinding.
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“Thank you,” Steve said, catching his eye as they picked up the last few pages and giving him a smile. Bucky felt like a six year old with a crush and grinned stupidly back at him. “I’m sorry to have made such a mess.”
“I’m sorry that I’ve put all your pages back in the wrong order.”
“He’d be happy to help you arrange them properly,” Natasha piped up, still sitting in the peanut gallery and sipping coffee. “He just loves that kind of all-nighter.”
Bucky was going to swap out all the colors on her color-coded highlighters, he swore to god.