Three days after I told Father about the Kamado family, the search was still moving through mountain villages and wisteria houses.
No answer had returned yet.
I tried not to think about what might happen before one did.
Shihan made that easier by striking the ground beside my foot whenever my attention wandered.
“Again,” he said. “And this time, keep your heel down until the rest of your body is ready to move. Thunder does not begin with you throwing yourself across the garden.”
I returned to the starting position, wooden sword held at my side. “The records described explosive movement.”
“The records assume the reader understands movement first. You read one exciting word and forgot the rest of the page.”
“I did not forget it.”
“Then prove it.”
The morning air felt cool inside my lungs. I drew it in slowly, directing the breath lower as Shihan had taught me. My shoulders remained loose. My weight settled over bent legs.
Thunder Breathing required a different rhythm from the steady breathing I had practiced over the past year. The breath gathered tension through the legs, preparing the body for sudden movement without letting the upper body become stiff.
I stepped.
My wooden sword cut downward as I exhaled.
The movement was faster than my usual practice, though nowhere near the techniques described in the records. Shihan watched my feet rather than the sword.
“Better. You lost the rhythm halfway through, but at least your legs did not abandon you.”
“That almost sounded kind.”
“It was not intended that way.”
I smiled as I reset.
A few days earlier, during my first attempt, the system had opened almost immediately.
Skill Awakened: Thunder Breathing Lv. 1
Description: A Breathing Style skill representing the user’s ability to apply the respiratory rhythm, muscular coordination, lower-body preparation, and explosive movement principles associated with Thunder Breathing. Practical effectiveness depends on Breath Control, Body Control, Physical Conditioning, Footwork, Swordsmanship, instruction quality, and physical compatibility. Current level permits only basic breathing exercises and introductory movement patterns. It does not grant mastery of Thunder Breathing forms.
I had expected the new skill to rise slowly.
Instead, every session pushed it forward.
Breath Control already understood rhythm. Body Control helped me separate tension from stiffness. Physical Conditioning kept my legs from losing form after a few attempts, while Footwork and Swordsmanship gave the breath something useful to support.
Thunder Breathing was new.
Most of its pieces were not.
The system recognized the difference.
I completed another sequence.
Inhale. Settle. Prepare.
Step and cut on the exhale.
Thunder Breathing Lv. 4 → Lv. 5
Breath Control Lv. 38 → Lv. 39
Shihan’s eyes narrowed when I smiled.
“You felt something improve.”
“I think the breath stayed with the movement that time.”
“Then explain why.”
I thought through the attempt. “I was trying to move quickly before. This time, I prepared the legs first and let the speed come from the step.”
Shihan nodded slowly. “Good. Speed is the result. Preparation is the technique. Do not confuse them.”
I raised my sword again. “How long before you teach me the First Form?”
“When you stop asking every morning.”
“That seems unrelated to my ability.”
“It is related to my patience.”
Behind the veranda screen, someone laughed.
Hinaki had promised not to interrupt training. Apparently, laughing from concealment did not count.
We continued until my breathing remained steady through five repeated sequences. On the final turn, my foot adjusted around loose gravel without breaking the motion.
A window appeared.
Footwork Lv. 29 → Lv. 30
Tier Advancement
Intermediate → Advanced
Tier Trait Unlocked: Adaptive Footwork
Description:Footwork represents the user’s balance, stepping patterns, directional movement, distance control, positioning, and ability to recover from changes in terrain or motion.
At the Advanced tier, familiar stepping patterns can be adjusted according to terrain, distance, speed, and surrounding movement with reduced conscious effort.
Intermediate Tier Effect: Positional Efficiency
Effect:Positional Efficiency increases by +1% per Footwork level above Lv. 9.
Current Effect: Positional Efficiency +21%
The gravel beneath my foot had shifted.
A year ago, I would have noticed too late. This time, my body changed the angle before I consciously understood the problem.
Shihan tapped the ground. “Do it again. If it was skill, you can repeat it. If it was luck, we will find out.”
By the time training ended, my legs were heavy, and the system had moved again.
Thunder Breathing Lv. 5 → Lv. 6
Swordsmanship Lv. 27 → Lv. 28
Agility +1
Endurance +1
I bowed to Shihan. “Thank you.”
“You may thank me by remembering all of it tomorrow.”
“I thought tomorrow was a rest day.”
“Then remember it while resting.”
That evening, I attended my first official Hashira meeting.
Mother dressed me herself, adjusting my collar while I tried to remain still.
“You are attending to observe,” she reminded me. “Your father may ask for your thoughts, but you do not need to prove you belong in the room.”
“I know I belong.”
Her hands paused.
The answer had come easily. A year earlier, I would have softened it or searched her face for permission.
Mother smiled and continued fixing the fold of my robe. “Good. Then remember that belonging does not require speaking every time you have a thought.”
“That part may be harder.”
“I know.”
The meeting took place in the largest audience room.
Father sat at the front, his back straight despite the illness spreading across his face. I took my place slightly behind and to his side.
The Hashira knelt before him.
Himejima Gyomei, the Stone Hashira, seemed even larger indoors. Prayer beads rested between his hands.
Rengoku Shinjuro, the Flame Hashira, sat with the posture of someone who had spent most of his life refusing to bend.
Uzui Tengen wore enough decoration to catch every lamp in the room. Tomioka Giyu sat quietly beside him, while Shinazugawa Sanemi looked as though remaining still required effort.
Kanae was absent, still recovering from her encounter with Upper Two.
Father introduced me without ceremony.
“Haruya will begin attending selected meetings as my heir. I ask that you speak as you normally would. A polished version of the Corps would teach him very little.”
Uzui smiled. “Then the young master will learn that our meetings are tragically lacking in flamboyance.”
Sanemi glanced at him. “You wear jewels to discuss casualty reports.”
“Exactly. Someone must defend morale.”
Shinjuro made a low sound in his throat. “If your clothes improve morale, Uzui, our standards have fallen.”
I lowered my eyes before anyone saw me smile.
The discussion turned to Doma.
Gyomei described the cold that spread through the forest and how quickly it damaged the lungs. Shinjuro argued that no single Hashira should engage Upper Two again without support. Sanemi wanted patrols expanded around the region where Doma had appeared.
Father guided them without raising his voice.
He asked questions, returned arguments to the people affected by them, and let silence remain when someone needed time to reconsider.
I had studied Leadership through reports and household problems. Watching Father use it among Hashira felt different. He never fought for control of the room.
He already had it.
After some time, Father glanced toward me.
“You have listened enough for your first evening. Our guests are waiting in the eastern hall. Please greet them in my place.”
I bowed. “Of course, Father.”
The eastern guest hall was far less solemn.
Uzui’s three wives had taken over one side of the room. Makio and Suma were arguing about who had packed the wrong tea, while Hinatsuru tried to settle the matter without laughing.
The Rengoku family sat near the garden doors.
Ruka Rengoku rose when I approached. Her sons stood with her. Kyojuro’s hair made him easy to identify even before he greeted me in a voice large enough to fill the hall.
“Ubuyashiki Haruya-sama! It is an honor to meet you properly!”
Senjuro winced beside him. “Brother, he is standing directly in front of you.”
“I wished to be clear.”
“You succeeded,” I said, greeting them with a smile. “I heard you from the corridor.”
Ruka’s smile appeared as Kyojuro laughed.
“You must forgive him,” she said. “Kyojuro believes warmth should be delivered at full volume.”
“It is difficult to misunderstand him.”
“That is one of my strengths!” Kyojuro said.
Senjuro looked at me apologetically, though the corner of his mouth had lifted. “He has several.”
I relaxed into the conversation more easily than I expected.
We spoke about training. Kyojuro wanted to know what Shihan had taught me, then caught himself before asking me to demonstrate indoors. Senjuro asked about the estate library, and Ruka listened with the quiet attention of someone who remembered what each person said.
Something about her bothered me.
She sat carefully after standing. Her breath was shallow for several moments, though the walk across the room had been short. Her skin seemed pale beneath the warmth of the lamps. When a tray of sweets passed, she took one to be polite and left it untouched.
I focused Observe.
The screen that appeared was more detailed than any I had seen before reaching Master.
Observe
Name: Ruka Rengoku
Age: 37
Relationship: Wife of Flame Hashira Shinjuro Rengoku. Mother of Kyojuro and Senjuro Rengoku.
Condition: Undiagnosed progressive illness, early stage.
Visible Indicators: Persistent fatigue. Suspected mild fever. Reduced appetite. Shallow breath following light exertion. Intermittent weakness.
Emotional State: Warm. Attentive. Mildly uneasy. Concealing discomfort to avoid worrying her family.
Immediate Risk: Mid.
Long-Term Risk Without Examination: High.
Recommended Action: Medical evaluation.
I closed the screen.
Ruka was still listening to Senjuro describe a book he wanted to find. Her smile had not changed.
“Ruka-sama,” I said when he finished, “may I ask you something personal?”
Her eyes returned to me. “Of course, young master.”
“You seemed short of breath when you sat down. Has that been happening often?”
Kyojuro’s attention shifted to his mother.
Ruka hesitated. “I have been more tired recently. The journey was longer than I expected.”
“Only during the journey?”
She looked toward the untouched sweet. “Perhaps for a few weeks. I assumed I needed more rest.”
“Have you spoken with a physician?”
“No. It did not seem serious enough to trouble anyone.”
I chose my next words carefully.
“I may be wrong, and I hope I am. Still, I would rather apologize for worrying you than remain quiet and discover later that I should have spoken.”
Her expression softened.
“You sound like your father.”
“That is usually a compliment.”
“It was intended as one.”
Kyojuro leaned forward, his usual brightness tightening around concern. “Mother, you have been eating less.”
“I did not realize my meals were being inspected.”
“They were not,” Senjuro said quietly. “We noticed.”
Ruka looked between her sons. For a moment, the calm expression slipped, leaving simple uncertainty beneath it.
“Then I will speak with a physician before we leave,” she said.
I nodded. “Thank you.”
When the Hashira meeting ended, I found Father before the guests departed.
He listened as I explained what I had noticed. Mother stood beside him, her face composed, though her attention sharpened with every symptom.
“I cannot tell what the illness is,” I finished. “I only know that something is wrong.”
Father called for an attendant.
“Ask the Corps physician to examine Ruka tonight. Prepare a room if she needs to remain here.”
Shinjuro had entered behind me. His expression changed when he heard his wife’s name.
“What happened?”
Father turned toward him. “Haruya noticed signs of illness. Ruka has agreed to an examination.”
Shinjuro looked at me, then toward the guest hall.
“She said she was tired from traveling.”
“She may be,” Father replied. “A physician can tell us more. We lose nothing by being careful.”
Shinjuro’s jaw tightened. He bowed once, quickly, then left for his family.
Father watched him go.
“She is precious to him,” I said.
“Yes,” Father answered. “And to her sons. Her connection to a Hashira gives us the chance to notice her, but it is not what makes her life valuable.”
I thought of Kanae.
Then the Kamados.
Then all the people whose lives had once sounded like pieces of a story.
“I understand.”
Father rested his hand on my head.
“You saw something others missed, and you spoke without frightening her. That is a good use of your eyes.”
The physician confirmed a fever before midnight.
There would be more examinations in the morning.
For now, Ruka remained at the estate with her family around her, and whatever had begun inside her body would no longer grow unnoticed.
It was a small change.
I was learning that small changes could reach very far.