Idea: another one based on a song
Song: stacy's brother
artist: Mas Tsai
Warnings: a hook up mentioned, this is kinda improvised because the song had some holes that didn't fit to Hogwarts

I've been hanging out with Stacy

James smiled at Sirius when Sirius entered the dorm. "HI Pads." Sirius smiled back and closed the door. "You know, a guy asked me if we were dating" Sirius snorted. James let out a giggle. 

Everybody thinks we are dating

'Cause I spend my weekends hanging at her house

She's a part of the cheer team

Top of her class and she's prom queen

"When's next quidditch?" Sirius asked while leaning into Remus, who had came behind him. "You are so pretty" Remus murmured making Sirius blush. "Tuesday" James answered to the question. 

Later at potions class Sirius opened his shirt a bit and James didn't blame him, it was hot as fuck.

When we study chemistry

she unbuttons her blouse

James turned to look at Regulus laughing to his friend messing up his potion. 

But I got a secret I must confess

It's not her laugh or the way she'd dress

"God damn Potter, quit staring at me. I know I'm attractive but lord, I'm beginning to suspect you have a crush on me" Sirius giggled. "I wasn't staring at you" James muttered. "Yeah right."

She's not the reason I've been thinking 'bout love

Sirius, James and Regulus were hanging out in the kitchen. James wasn't paying much atenttion, he was just staring at Regulus. "Prongs?" Sirius asked, finally waking James up. "What?" James muttered and blushed. "Why are you staring at Regulus like you were planniing on murder?" 

"I wasn't!" James said with a dramatic gasp. Regulus giggled and said, "Sure." What ever argument James had had to defend himself with faded into a bunch of struttering after hearing Regulus's beautiful giggles. 

Every weekend when we hang out

I loose my cool when he's around

And I don't know if this is just a crush

James looked at Sirius, wondering how he would react if he knew. He would probably be mad. 

How do I find the words to tell her?

I'm in love with Stacy's brother

Oh, ha-ha

Oh, oh

James was waiting in the dorm for Sirius to come back from detenttion. They were going to study for spells, aka Sirius was goiing to tutor James. 

I'm gonna stay the night at Stacy's

Don't know why my heart's been racin'

'Cause the whole school thinks we're gonna hit first base

Sirius entered the dorm and walked over to him. "Okay let's start. So what was the unclear part?"

Told me to study for biology

'Cause she wants to show me how to get an A

But I got a secret I must admit

It's not her lips I want to kiss

James had on a sweater that covered his neck too to save him from embarrasment

She's not the reason for the bruises 'round my neck

When the night came, James grabbed his invisibility cloak and sneaked out of the dorm, going to the dungeons

Every weekend I'm sneaking out through the window of her house

And the truth is, it ain't Stacy I undressed

Regulus moaned loudly as James thrusted in faster. "Fuck Daddy~!" Regulus screamed. James smirked and only thrusted in faster. 

How do I find the words to tell her?

I hooked up with Stacy's brother

Oh, oh oh, 

Oh, ha-ha, oh, oh

na-na-na

"Okay you have to tell me, what the fuck is going on with you and Regulus?" Sirius had his arms crossed, staring at James. 

James swalloed hard, "Look don't be mad-" 

"Just get to the point!"

"I love him!" 

Stacy, here's the truth

And I don't want to seem rude

You're not the only one on my mind

I wanna be best friends

But I don't want to pretend

The way that I've behaved is a crime

Oh, Stacy, I got to tell ya

I'm in holy with your big brother

"I know!!! It's obivous!! I'm not fucking stupid!!"

"And I don't ca- Wait what?"

Oh, oh, oh

Oh, oh, oh

na-na-na, da-da-da-da-da

Ha-ha-ha