Every time Remy laughed — a real, true, deep-from-the-tummy laugh — a butterfly would appear. Not an imaginary one. A real, soft-winged, gently fluttering butterfly that smelled of warm flowers and fresh rain.

Pink ones appeared when he giggled at silly jokes. Purple ones came when something truly surprised him. Golden ones — the rarest kind — appeared only when he laughed so hard that tears came to his eyes.

The trouble was, Remy was terribly shy. He was the kind of boy who kept his smiles small and his laughs even smaller. He was afraid that if he laughed out loud, people would stare, or wonder, or ask questions. So he kept his joy tucked safely inside his chest, quiet as a secret.

One evening, just as Remy was climbing into bed, he heard a very small voice from the windowsill.

“Excuse me,” said the voice. “I am terribly sorry to bother you at bedtime. But I have been waiting here for three weeks, and I am running out of time.”

Remy sat up. On the windowsill, curled around the latch, was the tiniest caterpillar he had ever seen. She had sixteen tiny orange feet, two golden antennae no bigger than eyelashes, and the most hopeful little face in the world.

“My name is Coco,” she said. “And I need exactly one thing from you — one proper, real, from-the-tummy laugh — so that I can become a butterfly.”

Remy stared at her. He had never told anyone about his secret. “How do you know about my laughs?” he whispered.

Coco smiled — and a caterpillar smile, Remy noticed, was a very warm thing. “All the butterflies in the meadow behind your house — every single one — was made from your laugh,” she said. “The pink ones from your giggles. The purple ones from your surprises. I have been watching them dance over the flowers all summer, and I thought: someday, I want to be one of them.“

Remy looked out the window. The meadow was dark, but if he squinted, he could just see the soft glow of resting butterflies on the grass — little jewels of pink and purple and gold, quietly dreaming.

He had made all of those.

Something warm and brave rose up in Remy’s chest. He looked at Coco — her sixteen tiny feet, her hopeful antennae, her caterpillar smile — and he thought about the meadow full of butterflies that he had never even noticed before.

And then Remy laughed.

It started small — a little puff of warmth. Then it grew bigger, and then bigger still, until it was rolling out of him like a wave, a real proper laugh, the kind that had been waiting inside him for years, the kind that shook the windowsill and rattled the lampshade and sent three books tumbling off the shelf — and Remy didn’t mind at all, because it felt like the finest thing he had ever done in his life.

The air above the windowsill began to shimmer. Then it glowed — a deep, golden, warm-honey glow that slowly took the shape of wings — enormous, perfect, golden wings, edged with tiny patterns like lace, trembling with the very first breath of a new life.

And where Coco the caterpillar had been, there now rested the most beautiful butterfly Remy had ever seen.

Coco flexed her golden wings once. Twice. Then she looked back at Remy and said — very quietly, so as not to wake the night — “Thank you.”

She lifted off the windowsill and drifted out into the dark meadow, and where she landed, a soft golden light bloomed in the grass like a tiny star.

Remy sat in his bed for a long time, looking out the window. The meadow was dotted with soft lights — pink, purple, teal, orange, and one perfect, bright gold.

He realised something that made him feel very warm and very sleepy at the same time: all that joy he had been keeping hidden inside him — it hadn’t disappeared. It had been going somewhere. Into the wings of every butterfly in the meadow. Into the soft glow of a world that was a little more beautiful because he had been in it.

He pulled his blanket up to his chin, closed his eyes, and smiled — a full, unguarded, wonderfully real smile.

Outside, the golden butterfly landed on his windowsill and quietly folded her wings.

And together, in the warm and laughing dark, they slept.