It all started with a teasing phone call, an unfinished mission, and two injured feet. It was supposed to be just another Valentine's Day... but Steve Rogers had something else in mind for Natasha Romanoff. Told in two parts, this story follows a secret romance struggling to stay hidden from curious teammates, prying eyes and one emotionally unstable scientist. Between candlelit dinners, stolen kisses, and uncontrollable desire, Natasha and Steve share intense moments... until they realize that loving each other might just be the most complicated mission of all.

This fanfic takes place shortly after the end of the Civil War of the MCU. Natasha realizes that she has more feelings for Steve than just friendship, but she realizes it a little too late, Steve and Sharon have already started a relationship. One night, Natasha ends up not resisting and invests in Steve, the two kiss and have a torrid love night, but the next day Natasha realizes that it was a mistake and decides to disappear to not to interrupt Steve's happiness. *First of all, english is not my first language, so I already have to apologize abou my writing here and I have to say that this has nothing to do with the Infinity War from the comics, since I never read that.*

In an alternate reality of Avengers: Endgame, Steve Rogers and Natasha Romanoff are chosen to retrieve the Soul Stone on Vormir. Faced with the agonizing dilemma of the "necessary sacrifice," they are forced to confront deep emotions and impossible choices. As they fight to save the universe, their bond grows stronger, revealing a love that defies fate. This story reimagines a pivotal moment, exploring the fine line between duty and desire, loss and hope, in an emotional journey of courage and redemption.