Ok, here is what chapter one of my Romanogers fanfiction will be, it's an alternate version of Endgame where it's Steve and Natasha on Vormir, here goes! I do not own Marvel or any of its characters, this is a work of fiction for fun.

Chapter one

Natasha's breath caught in her throat, a choked sob unable to escape as she watched in horror what she tried so hard to prevent. (How could this be happening? This can't be happening! It can't be!) Where the thoughts barreling through her mind at light speed. Earlier, Red Skull, the Guardian of the Soul Stone, had informed both her and Steve that in order to obtain the Soul Stone, one must give up something they love. A sacrifice, a soul for a soul, meaning one of them had to give their life in order for the Soul Stone to reveal it's self.

They sat in silence for a time after learning this, before Steve turned to Natasha and said, "There has to be another way. Maybe Red Skull is lying." Natasha shook her head slowly before looking at him and replying, "No, I don't think he is." Steve raises an eyebrow and asks incredulously, "Why? Because he knew both of our parents names?" Another shake before the super spy replied, "No, because as he said before when we first got here and you threw your shield at him. It's pointless to harm each other, your battle is long over. He is also the Guardian of the Soul Stone, his whole existence now is to lead others to get it, not keep them from it."

Hearing what he feared to be true, Cap's broad shoulders slumped slightly, before gazing at Black Widow, his Natasha, with resolve in his blue eyes. "Well, I guess then we know then who it has to be." Her green eyes locked with his, sharing the same level of intensity as she quipped back, "That's right, we do." Hearing the tone of her voice and how she said it made Steve's hair on the back of his kneck stand up. Both eyebrows shot nearly past his hairline as Captain America replied, "I'm beginning to think you and I have a different person in mind."

Hoping to bring some levity to the situation in an attempt to disuade her, Steve saw that Natasha saw it for what it was and brushed it off as she said, "It has to be me. I have red in my ledger, this is my chance to make up for every life I ever took under the Red Room's control. And if I can protect the rest of the Avengers and help bring back everyone else then so much the better." Cap put his hands on Black Widow's shoulders and looked straight into her eyes as he said.

"No, it should be me. I'm a man out of my own time. I don't belong here, if giving up my life can protect everyone I love and save the others, then that's what I'm going to do. Shall I pull rank on you? Natasha glared angrily at Steve before firing back, "As if that has ever really worked on me. You are a super soldier..." Steve quickly interjects, "You're a super spy, you have the serum too, and an even wider skill set than mine and you led the Avengers for five years..."

She silences him by placing a finger on his lips, before finishing, "A super soldier, you're Captain America! The Avengers need you more than they will ever need me. Please, Steve, let me do this. If we don't do this everyone dies anyway." She finishes this with a pleading look in her eyes, one he almost gives into, as he has never seen someone as strong and bold as Natasha beg. Not once. But he doesn't. He can't, for while he has carried Peggy's picture in his compass for all this time, it was only to help remind him of happier times.

Even though the thought of seeing her alive again had stired feelings long past up again, he knew they were fleeting. Their time had passed, Peggy had moved on and had a wonderful life. What good would it do to try and find some way back to the past to mess with that. It wasn't the first time after that Steve had realized he had stronger feelings for Natasha. He was in love with her, ever since they had been paired together in S.H.I.E.L.D., he loved her so much he let her go explore a possible relationship with Bruce when Steve thought he had missed his chance.

Then, two years on the run together after the civil war of the Avengers, it grew deeper. He couldn't focus on all the memories now, just as he couldn't let her die now. So he leaned his head down and rested his forehead on hers and wrapping his arms around her as she did the same,seeming to relent, he said "Ok, you win " A mournful ghost of a smile graced her lips as Natasha replied, "I always do. It'll be alright." Without looking at her Cap replies somberly, "I know it will."

Before viciously punching her in the stomach with enough force Natasha swore his fist was about to come out her back. As she doubled over Steve threw her bodily back away from him before sprinting towards the cliff face. The serum helped her to recover quickly enough to get up and race after him, sliding the last few steps to scissor kick Steve's legs out from under him. He rolled with it, back on his feet and blocking a punch thrown his way, recoiling not from the force of it but from the blazing green eyes that bore furiously into him.

"You stupid asshole, let me do this!" Natasha screamed at him before trading rapid fire punches with him. Her captain, her Steve. She would never admit it to herself, she couldn't. There was no future for them for certain now, and it angered her to no end. He could move on though, find someone who was worth saving, worth loving. She wanted to hold on to their time together, all the way to the end of her life, so she fought to sacrifice herself so he could live. Funny thing though, countless hours of sparring and training and learning from each other gave them both ample knowledge of how each of them fought.

Neither could gain an advantage over the other, until a memory came up into Steve's head of one particular sparring session he was watching between Natasha and Wanda. Wanda was clearly outmatched, so Natasha had said, "When faced with a situation you can't win, don't play fair. Cheat." Suckering Wanda with a low blow to end the session. So Steve took advantage of that advice now, pretending to reel from a strike at his head, Cap scooped up dirt from the ground before striking back at her and letting the dust fly instead of connecting with his fist.

This was the Black Widow though, and she had enough of a reaction time to avoid most of it, only needing to clear her eyes for a second. It was all Steve needed, sprinting away as fast as he could. Furiously shaking her head and wiping her eyes, as soon as she could see a little Natasha ran after him. Once her sight cleared and she could see fully, Natasha saw how close to the edge Steve had reached. She aimed her Widow bites quickly and fired. It took him in the leg and for a moment Steve was paralyzed as electricity coursed through him. It was over quickly thanks to his healing factor, but it was all the time Natasha needed.

She slammed into him, and the momentum caused them both to tumble over the edge of the cliff. Acting quickly, Natasha managed to fire her grapnel and secure the other end around Steve, haulting their descent. Natasha nearly fell from then, only for Steve to catch her by the wrist. They both looked down at the yawning darkness beneath them, just making out the floor of cliff before looking back into each other's eyes. "That wasn't very nice Steve. I see you took a play I suggested to Wanda."

"Yeah, I know, it was a dirty move." Steve replied, hoping to hear her laugh one more time. She mearly smirked and rolled her eyes as if to say, "Really? Dirty move?" He apologized and tried to pull her up. Natasha struggled and said, "Steve stop, this has to be done! It's the only way!" To which he shouted, "No! There has to be another way!" She shook her head softly and let go of his wrist, so it was only him holding onto her. " There is no other way, Steve." Natasha said softly, letting Steve hear her and feel the weight difference as she let go and gravity worked to pull her from him.

Tears briming at the edges of her green eyes she stared up into his blue eyes, getting lost in them for the final time she said, "It's ok. It'll be ok, Steve. Let me go. Just let me go." Natasha's voice broke on the last part, and Steve could bear it no longer. He tightened his grip on her wrist to near bone crushing strength causing Natasha to scream in pain, before growling with rage and desperation as he hauled her up with all his might. "No! I won't let the love of my life die!"planting his feet against the cliff face as he pulled for leverage, Captain America flung Black Widow back up to land heavily onto the edge of the cliff.

He unslung his sheild and used it to break the grapnel line. With that he plumeted down to the ground, his mission complete. As he fell he remembered how he came to be here, getting the serum, fighting along side Bucky in WWII. Saying goodbye to Peggy. Waking up in 21st century New York, saving it with Avengers. Working for S.H.I.E.L.D., with Natasha. Winter Soldier, the civil war that split the Avengers, running and hiding with Natasha and falling in love with her all that time. He closed his eyes and waited for the end. He didn't wait long.

And so there Natasha was, one moment ready to sacrifice her life for her family the Avengers, and for Steve, only to be lying on the edge of the cliff watching as the man she had realized she had come to love fall to his death. It was impossible, but Natasha swore she heard him hit the ground with bone shattering force from up at the top. She could just see his unmoving form, shaking her head back and forth in disbelief as horror and realization set in. Then a blinding flash of light stole Natasha's sight of Steve's body before she passed out.

She woke to the feeling weightlessness, slowly discovering her hair and clothes were drenched. Her eyes snapped open and she bolted up to a sitting position, splashing water in every direction. "STEVE! STEVE!" Natasha began screaming his name over and over, not wanting to believe the inevitable truth. She looked around franticly, seeing she was in some sort of a lake, a sun setting behind the mountains, casting a golden glow over all. Her hand banged into something hard and heard the familiar clang, even though it was muffled by the water. Natasha refuesed to look at first.

Looking would make it real, finally Natasha forced herself to look down to her right, and felt around with her hand. Natasha closed her right hand around the leather strap she knew so well and pulled up, lifting the shield of Captain America. The only thing she had left of Steve Rogers. In her left hand she felt a warm pulse, Natasha pulled her left hand from the water and slowly opened it. In the palm of her hand lay the Soul Stone, it's golden glow mimicking the setting sun. It was then it hit Natasha, hard. This was it. It was over. Steve Rogers, Captain America was dead.

She'd never again fight by his side, protecting and watching his back as he did for her, no more flirting and skirting around their feelings for one another. No more sparring sessions that lead to them nearly kissing and giving in to one another countless times. It was then she realised she loved him. Her, Natasha Romanoff, the Black Widow had fallen in love with America's golden boy. She had fallen in love, and never had the chance to tell him.

With a trembling hand Natasha brought the Stone up closer to inspect it before closing her fingers around it in a tight fisted grip and clutching it to her chest. He had told her he loved her, even if it was indirect as he had said he couldn't let the one he loves die. But Steve had said it. Had let her know. Now Natasha couldn't let him know. She could never tell him how she really felt, and in that moment she broke. Natasha Romanoff broke down, sobbing heavily, not caring if tears streamed down her face. After what seemed an eternity of grieving and crying, the Black Widow stood up, still holding the Soul Stone to her chest and Captain America's shield in the other. She slipped her hand into the straps, then activated her Pym particle to return back to the others.

Everyone appeared together, and seeing that they were all successful they didn't notice at first that one of their numbers were missing. Clint saw it first, saw Natasha staring at the transparent floor, her greens eyes swollen and red. "Quiet, quiet!" Clint shouted and was rewarded by silence as all eyes fell on to Natasha. She suddenly felt their gaze and became uncharacteristically uncomfortable. She shifted her weight unconsciously before Tony asked her, "Hey, where is Steve? Where's Capsicle?"

When she didn't respond Tony grew worried, Bruce asked as well, until Nebula finally spoke up. "I'm sorry, I forgot to tell all of you. When Thanos went to Vormir, he took Gamora with him, but returned only with the Soul Stone. The stone requires a sacrifice in order to obtain it." Scott Lang spoke up then, "So, So Captain America...is..." He couldn't bring himself to say it. Tony finished it for him, "He died for us. So we can save everyone else." His voice cracked, as he realized he'd never be able to see his friend and make things right between them.

Thor tried to comfort them by saying, "We have the Stones now, we can bring him back." Natasha finally looked up at everyone and said, "No. The Guardian of the Stone said it's permanent. There is no coming back from this." A look of steely determination flashed over her, as she pushed all of this aside. Emotions would not bring Steve back nor would it win them the mission he gave his life for. Bruce called out to Natasha as he reached for the shield, "Do you, want us to take that and..." He never got to finish the sentence as her grip tightned on the shield and a deadly look fell in her eyes. She lost Steve, she refused to lose his shield. "No. I'll carry it for him now. That's how we honor his memory, how we do right by Captain America. We fight." With that, Natasha strode over to the gauntlet that Bruce and Tony were crafting and placed the Soul Stone into it. It blazed to life, but barely matched the fire now burning in her green eyes.

The end of Chapter 1, let me know what you all think!