I. The Moon
"I think I'm in love with two people," Regulus announced to his two best friends as he stared the ceiling of his dorm room, sprawled dramatically on his bed. While Barry was resting his head on Evan's thighs, pretending to read a book.
"Finally admitting it, then?" Evan didn't look up from where he was braiding tiny plaits into Barty’s hair. "Only took you half year."
Regulus shot up, side eyeing Evan. "What do you mean 'finally'?"
Barty snorted, abandoning any pretense of reading. "Reg, darling, you're about as subtle as an elephant. The way you look at Potter and Y/N..."
"I do not look at them in any particular way!"
"No? Shall I refresh your memory? You literally walked into a wall last week when we were our way to class, because Potter flew past the window during Quidditch practice," Evan pointed out.
"And you spent three hours in the library yesterday 'studying' while Y/N read poetry," Barty added, using air quotes.
Regulus buried his face in his hands. "It's impossible anyway. They're... they're together."
"And?" Barty raised an eyebrow, exchanging a look with Evan. "We're together, but that doesn't mean we wouldn't be open to—"
"That's different!" Regulus protested. "You two... it makes sense. But me? With both of them? It's complicated enough being a Black who's in love with a Potter, but adding another person..."
"Love's always complicated, petite étoile," Evan said softly, using the nickname that he gave Regulus as a joke during their first year but it stayed up to now. "But that doesn't mean it's impossible."
Regulus looked between his best friends and felt something in his chest. "I just... I want what you have. But I want it with them. Both of them. Is that selfish?"
"No more selfish than wanting the sun and stars," Barty smiled. "Which, coincidentally..."
"Oh, shut up."
But he was smiling now too, even as his heart raced with a new found possibility.
II. The Sun
James Potter had a problem.
Actually, he had two problems, both currently sitting under a tree by the lake – his girlfriend, you, reading poetry to his Quidditch rival (and frequent source of confusing feelings) Regulus Black.
"Prongs, mate," Sirius said from beside him, "you're staring again."
"Am' not," James muttered, definitely staring, as Regulus laughed at something you said. "Just... making sure they're not plotting anything."
"Right. Because my brother, who blushes every time you say his name and your girlfriend, who writes you love notes in Ancient Runes, are definitely plotting against you."
James turned to his best friend, surprised. "Regulus blushes when..."
Sirius groaned. "Merlin's pants, you're both so oblivious. Just go talk to them!"
"But what if—"
"James Potter," Sirius grabbed his shoulders, "my brother looks at you the same way I look at Remus. Trust me, I would like to say some.. a lot of things about this, but s'not the time. Nor the place. I see it in the way he looks at you, at her. In the way she looks at him the same way she looks at you. And you? You've been pining after both of them for months. So please, for the love of my sanity, go talk to them before I hex you."
James blinked. "Oh."
"Yes, 'oh.' Now get your ass up, you absolute moron."
III. The Stars
You weren't blind.
You saw the way James watched Regulus during Quidditch matches, the way Regulus's grey eyes followed James across the Great Hall. You noticed how they both gravitated toward you, how their touches lingered, how they seemed to orbit around each other, despite claiming they cannot stand each other.
It was rather fitting, really. James with his bright energy, lighting up every room he entered. Regulus with his quiet grace, reflecting that light in his own beautiful way. And you, somewhere between them, trying to bridge the gap.
"Your boyfriend's staring again," Regulus murmured, eyes flicking between your book, the black lake and definetly not James.
"Is he now? Must be staring at you I suppose." you replied without missing a beat.
His head snapped up. "I- what?"
You smiled, closing the book before turning to face him. "Oh, come on, Reg. You can't tell me you haven't noticed."
"Noticed what?"
"The way James looks at you. The way you look at him. The way you both look at me. The way I look at the both of you"
Regulus went very still. "I... that's..."
"Complicated?" you suggested. "Maybe. But the best things usually are."
"But you and James..."
"Are very much in love," you agreed. "Just like we're both very much in love with you."
The confession hung in the air between you, as delicate as starlight.
"Oh," Regulus breathed.
And then James was there, dropping down beside you both with his usual grace (or lack thereof). "So," he said, running a hand through his perpetually messy curly hair, "Sirius threatened to hex me if I didn't come talk to you both."
"About?" Regulus asked, voice slightly higher than usual.
James looked between you both, golden in the afternoon sun. His eyes catched yours and you nod reassurning. You two haved talked about this before, and it seems it was finally time to let the cat out of the bag.
"About how... I'm pretty sure I'm in love with you. Well, the both of you. And how that should probably terrify me, but somehow doesn't."
"And maybe…" James continued while grinning, "we should continue this conversation somewhere more private? Like, say, a certain someone's dorm?" as his eyes flicked back to your figure.
"Subtle, Potter," Regulus rolled his eyes, but he was smiling.
"You love it."
"Merlin help me, I do."
Later, tangled together in your satin bed sheets, you three fit perfectly together. James's warmth, Regulus's cool touch and your steady presence between them. Their kisses tasted different. James like sugar quills, Regulus like mint and the rich English black tea he always has in the afternoons, but they go together so beautifully.
"We should have done this ages ago," James murmured against your neck while Regulus kissed patterns across your collarbone.
"Better late than never," you gasped as Regulus nipped at your skin.
"Much better," Regulus agreed, reaching up to tangle his fingers in James's hair.
And really, what were a few months of pining compared to this? The sun, the moon and the stars, finally aligned just right.