Authors note: This idea has been going through my head recently and so I thought I would write it out. I'm still working on my other stories and will hopefully have them updated soon. Hope you all enjoy!

Disclaimer: I only own the story, not Sailor Moon.

Chapter 1

The summer sun beat down on the streets of Tokyo as Serena headed towards Darien's apartment. It was her final day of school before the summer break and it couldn't come soon enough. It had been a hard year thanks to fighting Chaos and losing her friends once again. But now that was behind all of them. It seemed surreal to her that it had only been six months since she faced Chaos and won.

It would be a simple matter of time before she would graduate from high school and marry Darien. Luckily her grades had improved dramatically and she was starting to become the woman who would one day rule as Neo-Queen Serenity. The only sad part was that the Senshi had no idea of the changes that she had gone through. As she got closer to Darien's door she could hear voices inside.

"You can't be serious!" Darien exclaimed angrily. "Not after everything we have been through."

"I'm sorry Darien, but this is the only way." Setsuna replied calmly.

Serena stopped where she was and listened to the conversation that she wasn't supposed to hear.

"There has to be another way." Darien practically begged. "I can't do this to her."

'What are they talking about?' Serena wondered as she continued to listen in.

"Unfortunately there isn't any other way. Darien you have to let her go. It is the only way for things to work out." Setsuna stated.

"Fine, if there is no other way, then I guess I'll just have to deal with it." Darien sounded defeated on the other end. "She'll be here in a few minutes and I guess I better tell her good bye."

Serena could feel the tears coming down her face as she listened to Darien say those things to Setsuna. After everything they had been through he was going to leave her once more. She couldn't take it any more. She turned and walked back down the hall towards the elevator. She suddenly felt like just going home and being alone.

Darien had been sitting at his kitchen table reading one of his textbooks when he noticed he wasn't alone. "Setsuna, what brings you here? Apparently its official business judging by the fact that you are in Senshi form."

"Unfortunately that is exactly why I am here." Setsuna stated as she looked at him intently. "Darien, I hate telling you this, but I need Serena to help me with a mission and she will have to go on her own. No Senshi and no you."

Darien looked up at her in surprise. "What are you talking about? We haven't seen any enemies since Serena defeated Chaos. Why can't we help her on this mission?"

"Darien this is all incredibly complicated and I wish I could explain it to you fully, but as the Guardian of Time I am not permitted to. She has to do this assignment because she is the only one who is strong enough to accomplish what needs to be done." Setsuna paused momentarily before continuing on. "You are the only one I can trust with this information. What I am about to tell you is only a small portion of what she is going to be going through."

"I'm guessing the girls aren't even going to be informed of what's going on?" Darien replied.

"That's correct. Darien, I need to send Serena into the past, back to the time before your memories of each other were awakened. The Serena of that time will be here in this time in her place. Neither the past Serena or the present will know what's going on until the time is right. I will need you to look after the inexperienced Serena and keep her safe. You won't even be able to have contact with her."

"You can't be serious! Not after everything that we have been through." Darien stood up as he realized this wasn't exactly the best thing he'd heard lately.

"I'm sorry Darien, but it's the only way."

"There has to be another way. I can't do this to her."

"Unfortunately there isn't any other way. Darien you have to let her go. It is the only way for things to work out." Setsuna replied as calm as ever.

Darien sat back down defeated and ran a hand through his hair. "Fine, if there is no other way, then I guess I'll just have to deal with it. She'll be here in a few minutes and I guess I better tell her good bye."

"No Darien, you have to keep her in the dark about this. I'm sorry but this is the one time that you have to protect her and not interfere." Setsuna opened up a time portal and looked at him sadly. "This is the one time that I am allowed to mess with the time stream to fix some very big mistakes. Please just protect the younger Serena and keep her safe."

4 years earlier

Fourteen year old Serena sat on her bed and looked out at the moon. It had been another long day for her. Adjusting to being Sailor Moon was not going the way she wanted it to, or what the other three would have liked. They were running into so many problems as they tried to gather the rainbow crystals and beat Tuxedo Mask and the Negaverse to them. Luckily, thanks to Sailor Jupiter appearing on the scene things were looking up a little bit more.

The only thing she wondered about was if Tuxedo Mask was really on their side or not. She turned back to her nightstand and picked up the star locket that Tuxedo Mask had dropped in a recent battle. The melody that the locket played felt so familiar to her, but at the same time she couldn't place where she heard it. She turned off her light as her cat Luna hopped up on the bed.

"You need to get more serious about your Senshi duties, Serena." Luna began. "If you don't then we'll never get the rainbow crystals and find the Moon Princess."

"I know Luna." Serena sighed as she felt more pressure from her guardian. "I am doing the best I can. We'll talk in the morning. I just want to get some sleep."

"Alright then." Luna curled up at Serena's feet and fell asleep.

As she slept a glow came over her and she disappeared completely. In her place appeared the older version of Serena sound asleep as if nothing had happened.

"Sleep well, my Princess. Tomorrow will come all too soon and then your journey to save the world will start once more." Setsuna whispered to the sleeping form of the Serena from the future.