Grumble had lived under the bed for exactly three nights, and he was already certain he had made a terrible mistake.
It was not the bed itself that bothered him. The bed was fine. It had sturdy wooden legs, a dust ruffle that made an excellent curtain, and enough space underneath for a small monster to stretch out, store his things, and sleep without being stepped on. The bed was not the problem.
The problem was directly above the bed.
Something was up there. Something that breathed. Something that occasionally moved, sending little tremors through the mattress and the sheets. Something that made sounds — not loud sounds, not roaring sounds, but worse sounds. Small sounds. Little sighs and murmurs and the occasional rustle of fabric.
Grumble pressed his back against the wall and stared at the ceiling.
"Mum," he whispered.
No answer.
"Dad."
Still nothing. His parents had their own bed — a grand four-poster in the master bedroom on the other side of the hallway. They had told Grumble that every young monster must learn to claim their own bed eventually. "It is a rite of passage," his mother had said, adjusting his tiny monster cap. "Every monster worth their salt has spent time under a bed. You will love it."
Grumble did not love it.
The thing above him shifted again. The mattress creaked. Grumble's four eyes went wide and he pulled his blanket over his head, which was absurd because his blanket was knitted from shadow-yarn and was completely see-through, but it made him feel better.
He lay there for a long time, listening.
The breathing was steady now. Slow. Rhythmic. In and out, in and out. It was the breathing of something that was sleeping.
Grumble waited for the breathing to stop so the roaring could begin.
But the roaring never came.
By the fourth morning, Grumble had not slept at all. He had developed a theory. The thing above the bed — the breather, the sigher, the mattress-shifter — was keeping its noises small on purpose. It was luring him into a false sense of security. Any moment now, it would reveal its true nature. Any moment, it would pounce.
He crept to the edge of the bed and peered out.
The bedroom was bright. Morning light streamed through curtains decorated with little rockets and stars. A bookshelf lined one wall, stuffed with picture books. A toy box sat in the corner, overflowing with stuffed animals and wooden blocks. A pair of small sneakers lay by the door, one upside down.
And there, on the bed, was the creature.
It was small. Smaller than Grumble had expected. It had pale skin and dark hair spread across the pillow like spilled ink. Its mouth was slightly open. One arm was flung over its head, the other was clutching a stuffed elephant with a missing ear.
Grumble stared.
The creature did not roar. It did not bare its teeth. It did not even open its eyes.
It just lay there, breathing.
Grumble backed slowly under the bed. His heart was hammering. It was even worse than he had imagined. The creature was not fierce at all. It was just... sleeping. And somehow that was the most terrifying thing he had ever seen.
He knocked on the underside of the bed frame. Three quick taps. This was the signal for emergency monster consultation.
His mother's voice floated down from the master bedroom. "Grumble? What is it?"
"There is a creature on my bed," he whispered fiercely. "It is small and pale and it has an elephant."
"Is it a child?"
"It is definitely a child."
"Good. That means you have been assigned a proper bed. Well done."
"It is not well done. It is terrible. What do I do?"
His mother yawned. "Nothing. You let it sleep. Children sleep a great deal. It is one of their most useful features."
"But what if it wakes up?"
"Then it will go about its business and you will stay under the bed where you belong. Grumble, darling, this is how it works. The child sleeps on top. You live underneath. You do not interact. You do not make eye contact. You do not, under any circumstances, come out while it is awake."
"Why not?"
"Because children are fragile and you will frighten it."
"I will frighten it?"
"Terribly. You are a monster. Monsters are frightening. That is rather the point."
Grumble considered this. He was a monster. He was supposed to be the scary one. But the thing on his bed — the child — had not shown any signs of being scared at all. It was just lying up there, completely unbothered, as if there were not a monster inches below it.
This was confusing.
"Go back to sleep," said his mother. "And Grumble — do not wake the child."
Grumble did not go back to sleep. He sat under the bed and watched the child breathe.
By the fifth night, Grumble had developed a system. He had mapped every creak of the bed frame, catalogued every type of sigh the child made, and identified the precise sounds that meant the child was sleeping versus merely resting with its eyes closed.
The sleeping sounds were the best. Slow breathing, occasional mumbles about things Grumble did not understand — something about a dinosaur and juice and whether clouds had feelings. The resting sounds were worse because they included wiggling, and wiggling made the bed shake.
But something was changing.
Grumble was starting to find the sounds less frightening. Not less frightening in a good way — less frightening in a dangerous way. He was getting used to them. And getting used to things you were supposed to be afraid of was how monsters got complacent and ended up eaten.
He had to stay vigilant.
On the sixth night, something happened.
Grumble was lying on his back, staring at the underside of the mattress, when he heard a new sound. It was not a sigh or a murmur or a wiggle. It was a small, sniffly noise. Then another. Then a sound that could only be described as a hiccupping sob.
The child was crying.
Grumble sat up. His four ears swiveled toward the sound. The crying was quiet — the kind of crying that tried very hard not to be heard. It was the saddest sound Grumble had ever heard, and he had once listened to a foghorn for three hours.
He crept to the edge of the bed and peered out.
The child was sitting up. Its face was streaked with tears. It was clutching the stuffed elephant with the missing ear and rocking slightly.
"I want Teddy," it whispered.
Grumble looked around the room. There was no Teddy. There was the elephant, and there were blocks, and there were books, and there were sneakers, but no Teddy.
The child wiped its eyes with the back of its hand. "Mum?" it called. "Dad?"
The house was quiet. The child's parents were not coming.
Grumble looked at the child. The child looked at the stuffed elephant. And then the child dropped it.
The elephant landed on the floor with a soft thump and rolled under the bed.
It came to rest exactly three inches from Grumble's foot. And right beside it, half-hidden under a fold of the dust ruffle, was a small brown teddy bear with a ragged bow tie.
Grumble's four eyes went wide. The child wanted Teddy. And Teddy had been under the bed the whole time.
The child slid off the bed and crawled toward the gap. A small hand appeared, groping blindly in the dark under the bed.
Grumble froze.
The hand searched. It brushed against a dust bunny. It knocked over Grumble's tiny lamp. It reached further, fingers spread wide, and Grumble could see the child's face now — upside down, eyes red from crying, nose running, looking absolutely desperate.
The hand was going to touch him.
Grumble did what any sensible monster would do. He grabbed Teddy and pushed him into the child's waiting hand.
The child's fingers closed around the familiar fur. A breath caught. Then the child pulled Teddy out from under the bed and hugged him so tight the bow tie nearly came off.
"Teddy," the child whispered. "You were under the bed."
It looked at the gap under the bed.
"Thank you," it said.
Grumble did not breathe.
The child stood up, tucked Teddy under its arm, and climbed back into bed. Within minutes, the slow breathing had returned. Within ten minutes, the child was asleep.
Grumble sat under the bed for a very long time.
The child had said thank you.
The child had looked directly at the space where Grumble was hiding and said thank you, and then gone back to sleep as if a monster handing it a stuffed animal was the most normal thing in the world.
Something was wrong with his theory.
On the seventh night, Grumble made a decision. He was going to investigate.
He waited until the child was asleep. Then he crept out from under the bed, keeping close to the wall, and surveyed the room from a new perspective.
It was different out here. The room was bigger than it looked from underneath. The rockets on the curtains were tiny and bright. The books on the shelf had colourful spines with pictures of dragons and rabbits and children climbing trees. The toy box was open, and Grumble could see a stuffed dinosaur, a wooden train, a xylophone with rainbow keys, and at least three different kinds of ball.
None of this was scary.
The child lay on the bed, one arm around Teddy, the other hanging off the edge. Its face was peaceful. Its breathing was slow. In the blue glow of the nightlight — a little plastic moon that clipped to the headboard — it looked very small and very ordinary.
Grumble crept closer.
He climbed up the bedpost — monsters are excellent climbers — and perched on the edge of the mattress. The child was right there. He could see its eyelashes, the faint freckles across its nose, the way its hair curled behind its ears.
It was just a child.
A small, sleeping child who wanted its teddy bear and had said thank you when a monster handed it back.
Grumble felt something shift in his chest. It was not fear. It was something else entirely.
He climbed back down and returned to his spot under the bed. But he did not pull his shadow-yarn blanket over his head. He lay on his back and listened to the child breathe, and for the first time, the sound did not frighten him at all.
On the eighth night, Grumble's mother came to check on him.
"How are we settling in?" she asked, peering under the bed.
"I am fine," said Grumble.
"No trouble with the child?"
"No."
"Excellent. You are handling this very well. Most young monsters spend at least a fortnight hiding under the blanket."
"I hid under the blanket for one night," Grumble admitted. "It was see-through. It did not help."
His mother smiled. "You are braver than you think."
She left. Grumble stared at the ceiling.
He was braver than he thought.
He looked at the child's sneakers by the door. One was still upside down. The child had probably kicked it off in a hurry, racing out the door to start its day, laughing about something — a game, a friend, a dinosaur that wanted juice.
Grumble reached out and righted the sneaker.
It was a small thing. But it felt important.
That night, when the child climbed into bed, Grumble noticed something. The child paused. It looked at the gap under the bed. For one terrible moment, Grumble was sure it had seen him.
But the child just smiled — a small, sleepy smile — and tucked Teddy under its chin.
"Goodnight, Teddy," it murmured. Then, quieter: "Goodnight, under-the-bed."
Grumble's four eyes went wide.
The child knew he was there.
The child had always known he was there.
And the child was not afraid.
Grumble lay very still, his heart doing something complicated in his chest. Then he smiled too — a small, monster smile that nobody could see.
"Goodnight," he whispered back.
And for the first time since he had come to live under the bed, Grumble closed all four of his eyes and slept.
He dreamed of sneakers and elephants and a child who said thank you. And when he woke the next morning, the bed above him was empty and the sun was streaming through the rocket curtains and everything was exactly as it should be.
Grumble stretched, yawned with all four jaws, and settled in to wait for the child to come home.
He had a feeling this was going to work out just fine.