Dean was really starting to hate Sam for giving Cas an MP3 player. It was loaded with a lot of songs, mostly by one artist.

Ed Sheeran.

Cas seemed to have an obvious favorite, it was called Don't. He was obsessed with this guy. But, one day, Dean thought it was rather adorable.

He walked into the library and found Cas sitting at the table listening to his stupid MP3 player, bobbing his head slightly, quietly singing along with one of the songs.

"I met this girl late last year,

She said, 'Don't you worry if I disappear.'"

"Cas?" Dean called, hiding his amused smile.

"I told her I'm not really looking for another mistake.

I called an old friend thinking that the trouble would wait."

"Hey, earth to Cas!"

"But then I jump right in,

A week later returned.

I reckon she was only looking for a lover to burn.

But I gave her my time for two or three nights,

Then I put it on pause 'til the moment was right.

I went away for months until our paths crossed again,

She told me, 'I was never looking for a friend.'

Maybe you could swing by my room around 10:00.

Baby, bring a lemon and a bottle of gin.

We'll be in between the sheets 'til the late AM.

Baby, if you wanted me then you should've just said,

She's singing,

Ah lahmlahlah!"

Dean pulled one of the earbuds out of Cas's ear and yelled, "CAS!"

Cas jumped out of the chair, knocking it over in the process.

"Dean, don't do that!"

"Cas, this is getting ridiculous."

"What? I have developed a taste in music. Is that so wrong?"

"You're taking it to extremes, man."

"Excuse me for liking Ed Sheeran."

"Cas, you're obsessed."

"Well, my obsession distracts me from everyday needs. I need that. I need something to get me through the day. Ed Sheeran does just that. So I'm sorry if my stress is inconveniencing you!"

Dean just stared at him, a bit surprised by his outburst. "Okay. Okay. If this guy is that good, show me a song."

Reluctantly, Cas showed him another close favorite of his. Thinking Out Loud.

"When your legs don't work like they used to before

And I can't sweep you off of your feet

Will your mouth still remember the taste of my love?

Will your eyes still smile from your cheeks?"

Cas started singing along subconsciously.

"And, darling, I will be loving you 'til we're 70

And, baby, my heart could still fall as hard at 23

And I'm thinking 'bout how people fall in love in mysterious ways

Maybe just the touch of a hand

Well, me-I fall in love with you every single day

And I just wanna tell you I am

So honey now

Take me into your loving arms

Kiss me under the light of a thousand stars

Place your head on my beating heart

I'm thinking out loud

That maybe we found love right where we are

When my hair's all but gone and my memory fades

And the crowds don't remember my name

When my hands don't play the strings the same way

I know you will still love me the same

'Cause honey your soul could never grow old, it's evergreen

And, baby, your smile's forever in my mind and memory

I'm thinking 'bout how people fall in love in mysterious ways

Maybe it's all part of a plan

Well, I'll just keep on making the same mistakes

Hoping that you'll understand

But, baby, now

Take me into your loving arms

Kiss me under the light of a thousand stars

Place your head on my beating heart

Thinking out loud

That maybe we found love right where we are

So, baby, now

Take me into your loving arms

Kiss me under the light of a thousand stars

Oh, darling, place your head on my beating heart

I'm thinking out loud

That maybe we found love right where we are

Oh, baby, we found love right where we are

And we found love right where we are."

Dean couldn't help himself. He grabbed Cas by his blue tie and pressed their lips together. They stood there like that for a while, just kissing each other, but they eventually broke free.

"What was that?" Cas whispered.

"Cas... I'm thinking out loud. That maybe we found love right where we are. Am I right?"

Cas smiled. "Yes. I believe we have found love. Haven't we?"