Idea: Muggle Au. Sirius and Remus are in the same university. Sirius is being just a total simp for Remus, trying to get him to out for a coffee for the longest time. Kind of based on the song.
Words: 911
Warnings: some angst that got in accidentally but it's a good ending

"Remus!" 

He turned around to see a familiar face. It was Sirius Black. He was an art student and he looked like an art piece himself. Also, he was absolutely obsessed with Remus. It was like he knew where Remus was at all times. He'd always talk to him and flirt to him. Of course Remus noticed the flirting. However he liked to act oblivious, because it made Sirius flirt even more. He wanted Sirius to flirt with him more for... no particular reason. 

Sirius was famous for hookups yet Remus had still developed just a little crush on him. To be fair, everyone did. I mean come on, he was pratically like a walking pornstar. Not that actual pornstars wouldn't walk, but Remus had never actually seen one. So when Sirius started showing attraction to him, he immediately assumed it was a hookup. The issue was that Remus didn't want it to just be a hookup. 

Which is from where we get to why he was playing hard to get. He wanted Sirius to find another one. Of course he would've loved to fuck Sirius, but he didn't want it to be only that. 

"What do you want Black?" Remus asked once the shorter had made it over to him. "You" Sirius smirked and winked at him. Remus sighed and rolled his eyes. Inside his stomach filled with butterflies. "I walked right into that, didn't I?" Remus muttered. "Yup, you did" Sirius giggled. 

It kind of amazed Remus how happy Sirius always looked. It fascinated him, how those eyes never seemed the slightest bit upset. 

"Wouldn't you just fuck off, eh? Leave me alone for once?" Remus had honestly lost count on how long it had been going on for of Sirius just childishly begging for his attention, practically. 

"Not on a good mood today, are we Lupin?" 

Maybe Sirius was right and Remus just was a little more annoyed than usual, but in that moment he lost it. He was absolutely not going to be just another hookup of Sirius Black along the other thousands. 

"I'm being fucking serious! Have you really got nothing better to do than follow me everywhere like a fucking dog? I'm not interested in having fucking sex with you! How much more clear do I need to make that for you to fuck off? I don't want to be just another one of your fucking hookups for you to brag about like you always do. What's your fucking problem, really?! I'm impressed you even got into this fucking school with that lifestyle." 

And for the first time, Remus saw the light from Sirius's eyes turn off. He already felt guilt pooling in his stomach, seeing the way Sirius looked at him. Just a minute ago Sirius had been filled with energy and delight. Now he was really just a shadow of his usual self. Worse, it was all Remus's fault. 

"You don't actually believe I'm just a fucking manwhore, do you Remus?" Sirius asked. His voice lacked..life. It lacked everything he was usually filled with. "I haven't had sex in months. I'm not here to try to get into your pants. I just want your atenttion. Sure it's childish and all but-"

"And why's that?"

"What?"

"Why do you want my attention so badly that you practically harass me in daily basis?" Remus already regretted his word choice the second the words slipped out of his mouth. 

Sirius went pale and his eyes widened. "I'm so sorry Remus I didn't realize it was that bad. I should've stopped so long ago when you first told me to fuck off. I'm so sorry I didn't mean to harass you-" 

"You didn't answer the question. Why do you want my attention so badly if it's not to get railed?"

"Because I have a crush on you.." Sirius whispered shyly and stared at the floor. 

Remus was shocked more than anything. "You have a crush on me?" he asked, confused. 

"Yes!" Sirius looked up and suddenly he looked almost desperate to let Remus know, "How could I not? You are so handsome, first off.  You always look so fucking cute. You get passionate about books and literature so fast it's beautiful. You always bring this atmosphere around you that bring warmth and comfort. You might not be rich but I don't fucking care. Your hair is so messy and it's possibly the cutest thing I've ever seen. Your eyes capture mine every single time you even spare a glance at my way and it takes my breath away. So yes, I have a fucking crush on you Re-" 

Sirius was interrupted by Remus grabbing his waist and pulling him into a kiss. Sirius gasped and pulled slightly off as much as he enjoyed it. "But I thought you hated me?" "I made you think that because I really, really didn't want to just be a hook up." 

"I'm so sorry, I didn't realize I made you think that." 

"And I'm sorry I made you so upset. And I'm also sorry I didn't ask for consent before I kissed you, I shou-" 

"Fucking shut up and do it again." 

Remus chuckled and kissed Sirius again, to which the older kissed back to passionately.