The figure at the foot of the staircase did not move immediately.
It stood there, with that tilt of the head that was not possible in a normal body, watching them with eyes that had no defined pupil — only a dark surface that absorbed the little light coming in from the street. The muscles beneath its misshapen skin tensed and slackened with an irregularity that suggested the body had not quite worked out how to function, but that what it had worked out was enough to make it dangerous.
Shirogane Mei had the fans open.
"Amane," she said, without taking her eyes off the figure. "Stay back."
"You already told me that."
"I'm telling you again."
The humanoid being took a step forward. Shirogane responded with one to the side, repositioning herself, calculating the available space with the speed of someone who had done this before, though never exactly this.
The creature charged.
Shirogane turned the right fan in a short, precise arc. The sharpened edge of the ribs connected with the creature's cheek — a clean line, not deep but sufficient. The creature retreated with a sound Yūta recognised from somewhere behind his stomach. The same kind of complaint he had heard in the hospital. Different form, same foundation.
"It works," said Yūta.
"Of course it works," said Shirogane, not with the tone of someone boasting but of someone confirming a fact.
The creature shook itself. It looked at the line on its cheek with that pupil-less eye. And then it charged again, this time with its right arm extended in a blow aimed straight at Shirogane's torso.
Shirogane crossed the two fans in front of her at the last moment. The impact landed all the same — absorbed, but not eliminated — and sent her back two steps, her feet searching for purchase on the floor.
The creature's left arm was already coming.
Yūta did not think.
The kick connected with the side of the creature's head with all the force Yūta had, which turned out to be more than he had expected, because the creature was sent flying sideways and struck the wall with a crash that shook the window frame.
Shirogane looked at him.
"Thank you," she said.
"Don't mention it." Yūta shook out his foot, which was protesting mildly from the impact. "There's another one upstairs, isn't there? Tsukino's fighting something."
As if to confirm it, another dull impact reached them from the ceiling, followed by a crack of wood.
"She can handle it," said Shirogane, turning back to the humanoid creature that was pulling itself up from the wall. "We've got enough down here."
Upstairs, Tsukino Hina was not thinking about the ones below.
She was thinking about the beast in front of her, which moved on four legs and was misshapen and had a way of moving that corresponded to no animal Tsukino had ever seen before — too fast for its size, too erratic to anticipate easily. The room on the second floor was wide but not particularly so, with overturned furniture and a broken window through which the Fukuoka air came in mixed with something that smelled of wet earth and something else with no name.
Tsukino had the axe in her right hand.
The beast watched her with its eyes — four of them, arranged in pairs on either side of a head that was too wide — with an attention that was not exactly intelligent but was not purely instinctive either. There was something in between. Something that calculated.
Tsukino took a step forward.
The beast did not step back.
"Good," said Tsukino, almost to herself.
She charged.
The axe came down in a diagonal arc that would have split the beast in two had the beast remained where it was. But the beast did not remain where it was — it threw itself to one side with a speed that did not match that body, and the axe cut the air and found only the creature's left flank, leaving a line that seeped something dark.
The beast whimpered. Then it turned.
"Is that all you've got?" said Tsukino.
The beast answered with its legs.
The blow came from below, a kick with the right hind leg that Tsukino did not anticipate fully because she had been watching the front legs. It caught her in the side with enough force to send her into the wall, and the impact against the wall was sharp enough to leave the taste of copper in her mouth.
She spat.
She wiped her lip with the back of her hand.
She looked at the dark smear.
"Good," she said again, with a calm that now had a different edge to it. "That I liked better."
The beast lowered its head and charged straight on this time, without feinting, with the speed of something that had decided to finish this quickly. Tsukino waited, waited, waited — and at the last possible moment pivoted on her right foot and let the beast pass beside her, bringing the axe down in a vertical strike that found the creature's left front leg.
The sound was final.
The beast fell to that side, roaring, the leg no longer responding properly. It thrashed. Tried to stand. Fell again.
Tsukino walked towards it with the axe ready.
"Let's finish this."
Below, the fight had found a rhythm.
Not a comfortable rhythm — the creature was strong and fast and had the specific advantage of not tiring the way they did — but a rhythm all the same, one that Shirogane had established with the precision of someone who thinks while she acts.
"Now," she said.
Yūta came in from the left with a blow to the creature's side while Shirogane launched a blade of wind from the right with the left fan. The creature tried to block both at once and could not block either one fully. It retreated. Shirogane was already repositioning.
"Good," she said. "Again. When I say."
"Understood."
"Not before."
"Understood, Shirogane."
The creature charged at Yūta this time, ignoring Shirogane, calculating that the one without a weapon was the most vulnerable. Yūta dodged to the right, which was exactly where Shirogane needed him to be, and the blade of wind she launched found the creature's left flank with enough force to spin it around.
Yūta struck it at the back of the neck as it turned.
The creature went down on one knee.
"Good," said Shirogane again. And there was something in her voice that was not exactly surprise, but resembled it.
Then came the roar.
It was not a sound that corresponded to the four-legged creature Tsukino had been fighting upstairs — it was too large for that, too deep, as though it came from something using the full capacity of its lungs for the last time.
The creature below stopped mid-movement.
It turned its head towards the staircase.
And waited.
Yūta and Shirogane looked at each other.
"What—"
The ceiling above their heads groaned with the impact of something heavy moving at full speed. Then the staircase. Then the four-legged beast — with one leg that no longer worked properly, seeping something dark — reached the foot of the stairs with the specific speed of something that was not fleeing but searching for something.
It found the humanoid creature.
What happened next lasted less than three seconds and Yūta did not know how to describe it except as something that should not have been possible and was nevertheless happening in front of him. The two creatures touched — and dissolved into one another with a fluidity that held nothing violent, as though they had always been parts of the same thing and what had come before had been only a temporary separation.
What remained in the centre of the ground floor was unlike either of the two.
Humanoid, but barely. Entirely white — a whiteness that was not clean but was the absence of something — with blue veins visible beneath the skin like rivers on a map. Muscular in a way that left room for nothing else. The face was misshapen but not without form — it had features, or something approaching features, and eyes that were completely black except for a point of blue light at the centre of each one.
It stood still for a moment.
Then it breathed.
Shirogane did not move. Yūta glanced at her from the corner of his eye and saw something in her face he had not seen before — not exactly fear, but the closest Shirogane Mei had come to anything resembling it.
"Shirogane."
"Give me a second," she said, quietly.
"Have you seen one like this before?"
"No." A pause. "Nobody told me they could do this."
Down the staircase came Tsukino's feet. Then the rest of her — her hair slightly dishevelled, her lip split, the axe in her hand with that dark smear that was not exactly blood. She descended the last few steps looking at the floor with the expression of someone still processing their fury.
"That beast is going to pay for this when I find it," she said, without lifting her gaze. "Where is it? Did it come down here?"
Shirogane did not answer.
Tsukino looked up.
She saw what was standing in the centre of the ground floor.
She was silent for exactly two seconds.
"Is that—"
"They merged," said Shirogane.
Tsukino looked at the white creature with blue veins. Then at Shirogane. Then back at the creature.
"Brilliant," she said, in a tone that was not brilliant in any sense. "Get ready."
The white creature turned its head towards the three of them, that blue light blinking at the centre of its eyes. And then it moved — not with the erratic speed of the two creatures separately, but with something calmer and more deliberate and for precisely that reason more frightening.
Tsukino was the first to respond.
The axe came down in an arc that the creature sidestepped backwards, and the blade of wind Shirogane launched simultaneously from the flank found only air because the creature was no longer where it had been. It was faster than the two remnants separately. It was faster than any of the three had calculated.
The counterattack came before Tsukino could reposition — a blow with the right arm that she blocked with the axe handle but that pushed her back regardless, making her step wrong and lose a second of balance.
Yūta came in from the right.
He had no plan. He had the instinct that if Tsukino lost that second alone it would be worse, and that a second was enough to change something. The blow he aimed at the creature's side caused no visible damage — the white skin barely tensed at the impact — but it made the creature turn towards him, and that gave Tsukino the second she needed.
"Amane," said Tsukino, recovering her balance.
"What?"
"Can you hold its arms?"
Yūta looked at the creature. Then at Tsukino.
"Hold its arms?"
"If you immobilise it for a second that's enough."
"It's twice my size."
"I know."
Shirogane intervened from the side, launching two quick blades that forced the creature to raise its arms to block. They did not cut deep, but they distracted it, and in that instant Tsukino looked at Yūta with an expression that was not exactly a question but something closer to a proposal.
"If it goes wrong," said Yūta, "you'll hold it over me for the rest of my life."
"If it goes wrong you won't have a rest of your life," said Tsukino.
"Shirogane," said Yūta. "What do you think?"
Shirogane launched another blade without taking her eyes off the creature.
"That I don't recommend it," she said. "But if you're going to do it, do it when I say."
Tsukino let out a short laugh. Not from amusement exactly — the kind of laugh that comes out when a situation is so absurd that no other response remains.
"Get ready," she told Yūta.
Tsukino's axe changed.
Not all at once — it was gradual, over the space of two seconds, as though the metal were remembering something it had always known how to do. The blade expanded, the handle lengthened, and what had been a one-handed axe became something that required both hands and that had a visible weight even from where Yūta stood. The light emanating from it was more intense now — not orange but something closer to yellow-white, like the edge of something very hot.
The white creature looked at it.
For the first time since it had appeared, something in its posture changed.
"It costs more," said Shirogane, without stopping moving. "Don't use it any more than you have to."
"I know," said Tsukino.
"Tsukino."
"I know, Shirogane."
The creature charged at Tsukino — at the axe, which was the most obvious threat. Shirogane launched two diagonal blades that forced it to veer slightly, and in that veering Yūta came in from behind.
Finding the arms was harder than he had calculated because the creature kept moving them, but in the second when one of Shirogane's blades connected with the right shoulder making it turn, Yūta wrapped himself around it from behind and seized both arms at the elbows with all the strength he had.
The creature lunged forward.
Yūta did not let go.
His feet dragged several centimetres across the floor, but he did not let go. His arms protested with an intensity that suggested tomorrow he would not be able to lift them fully.
"Now," he said, through his teeth.
Tsukino was already moving.
The axe came down in a vertical arc with both hands and the full weight of her body behind it. The sound it made on contact was not the same as the small axe had made — it was deeper, more final, like the closing of something that had been open too long.
The white creature with blue veins split in two.
And then, instead of falling, it dissolved.
Not into blood or matter — it simply ceased to exist, with the same quiet naturalness with which it had appeared, and in the space where it had been there remained for a moment something Yūta did not know how to describe except as a light. Not bright or dramatic — simply present, for two or three seconds, before it too disappeared.
The house became a house again.
The windows that had been broken were still broken, but the darkness that was not ordinary darkness had gone, and through the front door the light from the street lamps came in with the complete normality of something that had never had anything particular about it.
The three of them stood in the centre of the ground floor without speaking for a moment.
Yūta released the arms he was no longer holding and lowered his own slowly. Tsukino let the axe return to its normal size and put it away. Shirogane closed the fans with a movement that was slower than the ones before — the only indication that the body had its limits too.
"Are you both all right?" asked Shirogane.
"Yes," said Yūta.
"Yes," said Tsukino, who had a split lip and a posture that suggested her left side was reminding her of the impact against the second-floor wall.
Nobody pointed either thing out.
Kato Ginjiro was standing in front of the door eating something wrapped in paper when the three of them came out.
Mentaiko. The filling typical of Fukuoka, pink and with the specific smell of the sea and pepper. He was eating it with the quiet focus of someone who was enjoying it.
He looked at the three of them. He assessed them in a second in the way he always did — quickly, without making it obvious he was doing so.
"Well done," he said.
"They merged," said Yūta, surprised. "The two remnants. Into one. Is that normal?"
Kato Ginjiro chewed. He considered the question.
"No," he said.
"How not normal?"
"Quite."
Yūta looked at him, waiting for more. Kato Ginjiro held out the mentaiko packet.
"Would you like some?"
"Kato."
"It's good. Local speciality."
"Kato."
The man lowered the packet slightly.
"We'll talk about it in Tokyo," he said, in a tone that for the first time in two days held nothing of the unconcerned about it. "Tonight, rest. All three of you did well."
Tsukino crossed her arms.
"Where were you in the meantime?"
"Doing something."
"What something?"
Kato Ginjiro raised the mentaiko packet in response.
Tsukino looked at him with the expression of someone who has four things to say and chooses to say none of them. Shirogane covered her mouth with her hand, which was her version of a smile.
Yūta looked at Tsukino. Then at Kato. Then at the mentaiko packet.
"Were there discounts?" he asked.
Kato Ginjiro smiled.
"There are always discounts if you know where to look."
What Kato Ginjiro did not say — what he kept to himself while the three young people talked amongst themselves with that specific energy of people who have survived something together for the first time — was that the earlier phone call had not been about the remnant in the house.
It had been about the hunters in the area. Three of them had spent a week reporting behaviour that corresponded to nothing in the records. Remnants moving in groups. Coordinating.
Kato Ginjiro finished the mentaiko and folded the paper into his pocket.
He looked at the three young people.