Sorry for a Swedish song but I love it! 
Kalle Johansson have done an English version but of course it isn't on youtube. You can check it out on iTunes or Spotify, it's called All For You.
I adore it on both languages, but the English version is a little different so if somethings aren't the same with the lyrics you know why (I wrote after the swedish one)
And if you all are lazy I'll put the English lyrics after the text!

Leo slept and Nico kept counting his breaths. Up and down, up and down. Nico loved watching Leo sleep, he looked so childish, more like an elf than ever before and he couldn't help smiling. Leo's brown curls were spread out on his pillow, Nico couldn't fall asleep, what if something happened.

They had moved in this morning. In their own apartment. The white walls were to be painted, pictures, paintings, and shelves were to go up on the walls. The living room was a mess of boxes, and so was the kitchen but Nico didn't care.

All he worried about was that a monster would storm in. Nico was a child of the big three, that meant a lot of monsters. But Leo had loved the apartment, and he had gotten a job not far from it, and Nico really wanted Leo happy so he had agreed.

Worrying about monsters would soon fade too, he had never heard of a monster who ran in screaming bloody murder when you were frying bacon, or on the toilet. Or sleeping. At least that never happened to Percy, or Annabeth. Sure spiders, cows, and something else that the Gods sent their way wasn't so hard to believe, but a monster. Hell this wasn't fantasy anymore.

Leo had an ordinary job, Nico was still looking. They had paintbrushes and paint just waiting to be used. They had boxes with clothes waiting to be hanged in the closet.

When Nico got restless he went to the living room, they had a small balcony which he now stood on. The morning air was chilly, especially since Nico only stood there in his boxers and a t-shirt.

The city was alive, New York hardly slept so there wasn't really anything weird about it. As Nico looked over the tower blocks, the family homes, the shops, the people who walked all the way down on the sidewalks, milling around like ants. The sun had started rising sending the sky into a red, pink and orange hue that made Nico's heart flutter.

This was a new start. He had never belonged in the camps, neither the Greek or roman one. He hadn't felt at home anywhere, until now.

Sure cabin 13 was cozy, dark, and he loved it. But it didn't suit him anymore. He was happy here with Leo, ever if the city was full of asphalt and noises, and cars, he wouldn't trade it for the camp. The strawberry field was over rated, he could cook for himself, having a job would mean so much more to him than sword training ever would.

The colors would fade, the green hills gone, the golden beach also, but they could always visit the camp. Hell Chiron had begged them to come and visit and train some of the new campers. In due time they would. For now, they would settle.

"Why aren't you sleeping?" Leo asked huskily. "It's raining."

Nico looked around, noticing that his boyfriend was right. A nice drizzle with rain was soaking him, his t-shirt flat against his stomach. He didn't mind though, it rarely rained at camp, this was reality.

It could rain, thunder, earthquake, fire, whatever. At least it was more real somehow. After rain comes the rainbow.

"I don't mind." Nico said smiling.

Leo walked out and leaned against the railing as Nico was, "You'll get sick."

"You can take care of me" he answered simply.

"You're crazy."

"Only for you." Nico smiled cheekily. "Why you wake up, you looked so peaceful."

"The bed got cold without you." Leo said sadly.

"Bullshit." Nico laughed.

"Okay, so I saw my boyfriend stand on the balcony, dripping wet, thought he looked hot and wanted to enjoy some time with him." Leo smiled. "You are really hot when you are wet."

"Good to know." Nico yawned.

"Do you regret moving here? You look homesick."

"No I like it here. Besides I would be anywhere if it was with you. I would do anything for you." Nico said shaking his head.

"You would kill a man for me?"

"No."

"A woman?" Leo asked tentative.

"No."

"A dog?"

"Why would I kill a dog?"

"You said you do anything for me." Leo pouted.

"I think you are the one who is crazy."

"Only for you." And then Leo gave him a sizzling kiss, he warmed them with the fire that burned inside him, making them forget all about the rain.

Nico lived for these moments.

------

Okay this is the English version so the lyrics doesn't match up with the one shot, and don't judge because I literally couldn't find the English lyrics anywhere so I wrote down while I listened, so if there is something wrong you can blame my bad hearing, or his crazy accent!

Watching you sleep in the morning sun

I hear you breathing, the smell of your skin

This is our place, our eternity

We got our own world, no one gets in

Nothing could be more for real

Nothing can change how I feel

And even if the sky will fall

If the stars go black

If the sun wouldn't shine I would bring it back

Cause for you I would walk a million miles

Just to catch one look of that crazy smile

And I know that nothing comes for free

In a world that says I love me

But now hear when I say it's all for you

All for you

The sky is on fire when we go home

And it is right now, I whisper your name

Moments we keep for a rainy day

Feels like I'm flying can't hold a sound

And nothing could be more for real

Nothing could change how I feel

And even if the sky will fall

If the stars go black

If the sun wouldn't shine I would bring it back

Cause for you I would walk a million miles

Just to catch one look of that crazy smile

And i know that nothing comes for free

In a world that says I love me

But now hear when I say it's all for you

All for you

Doing it all for x7

All for you

And even if the sky will fall

If the stars go black

If the sun wouldn't shine I would bring it back

Cause for you I would walk a million miles

Just to catch one look of that crazy smile

And I know that nothing comes for free

In a world that says I love me

But now hear when I say it's all for you

All for you