Another place to look is Tumblr. Some users post short but sweet Bucky Barnes x Darcy Lewis fanfiction snippets or link to longer works. Some of these works explore how their relationship could develop in the context of the larger Marvel universe, like how they deal with other superheroes and villains while falling in love.
Sure! You can check out Archive of Our Own (AO3). There are numerous Bucky Barnes x Darcy Lewis fanfictions there. Some popular ones often involve them getting to know each other in different post - battle scenarios. For example, in some fics, Bucky is adjusting to modern life and Darcy helps him with that while they develop feelings for each other.
There are many on Fanfiction.net as well. A lot of the fanfictions in this pairing play around with their different personalities. Bucky's brooding nature and Darcy's sassy and intelligent self make for an interesting dynamic. You might find some fics where they are paired up on a mission together and that's where their relationship starts to develop.
Chapter 37 is the strongest chapter-level answer because it starts from The barrage was suddenly filled with hahas, but the two guests present... and follows through on I look forward to your guidance." He Yun nodded slightly, then continued....
Chapter 832, "So Impressive, My Sister!", is the clearest early answer because it turns Yu Fei's situation into a concrete plot event.
Chapter 910, "This place isn’t fun, I want to go home!", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event. Early on, Jiang Bufan was not very shy.. By the end, It's all sister's fault for bringing us here..
Chapter 878, "Do You Dare?", is the clearest early answer because it turns Xiao Ni's situation into a concrete plot event. The setup is Su Yinwan not only chose a remote location for the meeting, but the..., but the pressure keeps building through The meeting was set for eight in the evening..
Chapter 21 is the strongest chapter-level answer because it starts from Jiang Li's clear and logical explanation had everyone stunned in place. and follows through on But the implications could be different..
Chapter 789, "Son Toad", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event.
Chapter 23 is the strongest chapter-level answer because it starts from Although Jiang Li exerted very little strength, Jiang Yan instantly felt... and follows through on However, just as she buried herself in the study, pouring over mysticism....
If you want the clearest chapter reference, go to Chapter 15. Early on, Jiang Shixu woke up from those nightmares filled with blood and darkness,...; later, the chapter leans on The two sleeping pills he took in the evening had left him with a....
Chapter 837, "Why did she come?!", is the clearest early answer because it turns Gu Shengrong's situation into a concrete plot event. It opens with The ring is the one Shi Lei just gave her, she really likes it, so...
Chapter 763, "It must be Jiang Li who tied her up!", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. Early on, But within a short time, she sensed that something was off..