The morning sun painted the stone walls of Takagamine Castle in gold. Sayo walked through the inner corridor. Otake, the lady's maid, moved one step ahead, and Sayo followed in her wake. Shoji screens lined both sides of the hallway, and the morning light filtered through the paper, casting a soft glow into the rooms beyond. The tatami beneath her feet had been freshly laid—the scent of rush grass tickled her nose, green and alive. "I shall show you to the writing room in the main keep." Otake's voice was flat, matter-of-fact. Since the previous night, when she had seen Sayo tidying her quarters, the maids' attitudes had shifted subtly. Wariness remained, but it was no longer absolute rejection. The connecting corridor leading to the main keep. This was the "Shinobi Bridge"—a passage that could not be crossed without Zuigetsu-in's permission. Sayo felt the weight of that fact with each step forward. *Life and death hang in the balance.* The modern Sayo had spent her days in a university library, researching the warlords of the Warring States period. But the knowledge contained in books and the reality that surrounded her now were entirely different things. The books contained no mention of "Oda Nobuhiro." A figure outside the mainstream of recorded history. Or perhaps, in this timeline, he had not yet accomplished anything of note. The writing room door drew near. "Forgive the wait. I have brought Sayo." Otake knocked. A brief silence. Then a low, quiet man's voice echoed through the wood. "Enter." The door opened. The writing room was larger than she had anticipated. A space of perhaps eight tatami mats. From the north-facing window, the castle town spread below in full view—the roofs of houses illuminated by the morning sun. A single scroll hung on the wall. A battlefield map lay spread across the desk. And there he was. Oda Nobuhiro. Twenty-eight years old. Black hair bound simply at the back of his head, sharp eyes that cut like blades. His shoulders were broad, and even seated, his body radiated coiled strength. His kimono was a dull deep purple—no ornament, no decoration. The very essence of a warrior. But what caught the eye most was his gaze. Cold. Certainly that. But beneath that coldness lay something else. A light that had gone out. As though he had lost someone and carried that loss in the depths of his eyes—a darkness that spoke of irretrievable absence. Nobuhiro glanced at Sayo. Only for a moment. Then his eyes returned to the map. "So you are the new concubine." His voice held no emotion. It was the tone of a man appraising a tool. "Yes. I am called Sayo." Sayo folded her knees and bowed her head. In that moment, she became aware of another presence in the room. A man of perhaps thirty years. Jet-black hair bound at the back of his head, a thin sword scar running from his right eyebrow to his cheek. Amber eyes that fixed upon Sayo with a gaze that mingled caution with something far more complex. "This is Sotaro, my vice-commander. I entrust the castle's defense to him." Nobuhiro spoke in his flat, measured way. Sotaro merely tilted his head slightly, saying nothing. That silence itself spoke volumes of his wariness toward this newcomer. *This man is protecting his lord.* Sayo understood it instinctively. Sotaro was the type whose loyalty to Nobuhiro was absolute, and who would suspect anyone who drew near to his master. "I hear you can read and write. That is unusual." At Nobuhiro's words, Sayo's face lifted. "Yes. A Buddhist priest at the village temple taught me a little." As she spoke, Nobuhiro produced brush and paper. "Show me." Sayo approached the desk and took up the brush. She checked her hands—they were not trembling. Her fingers were steady. The grip she had practiced countless times in the modern world came naturally. But what should she write? What was Nobuhiro testing? *He is measuring my ability.* That was her judgment. The sound of grinding ink. Water falling into the inkstone. Each sound resonated through the quiet room. "Owari Province, Takagamine Castle, Oda Nobuhiro." The characters flowed onto the paper. Knowledge gained in the modern era. The sense of the brush cultivated through years of Japanese history study. The proper notation of this moment in the Warring States period. All of it became a single stream, flowing from brush to paper. Fluid. Precise. Without hesitation. It was a quality of writing that no woman of this age should possess. Silence stretched. Nobuhiro stared at the characters. So did Sotaro. "...You write well. Where did you learn?" Nobuhiro's question met the answer Sayo had prepared. "A Buddhist priest at the village temple taught me a little. After that, I continued to practice alone." It was not a lie. The time in the village, the memories after the fire—all of it was true. Only the true place of her studies—a university library—was something no one needed to know. "Very well." After a few seconds of silence, Nobuhiro offered only those words. And his expression returned to one of indifference. But in that moment, Sayo perceived it. A light in Nobuhiro's eyes. For just an instant, it had kindled. Interest. A response to something rare. The moment he had recognized her not as a concubine, but as a presence—a being worthy of notice. Though it had vanished just as quickly. "Stay quiet in the inner quarters." With those words, Nobuhiro's gaze returned to the map. "Do nothing unnecessary. Follow the castle's rules. Do you understand?" "Yes. I understand." Sayo answered and rose to her feet. As she turned to leave, she found herself doing something she had not intended. *She looked at him once more.* Sayo's eyes lingered on Nobuhiro's face. That cold expression. Nearly expressionless. But in the depths of his eyes—in that lightless darkness—there was something. A loneliness so profound it seemed to have no bottom. As though he had lost someone and had completely, utterly abandoned all hope of ever reclaiming them. That sensation resonated with something within Sayo herself. *What has this man lost?* In that instant, Nobuhiro's eyes flickered. He looked directly at her. "What is it?" Cold. Brief. "Nothing. Forgive me." Sayo bowed and hurried from the room. Behind her, she heard Sotaro speaking to his lord—his voice low, the words indistinct. But the tone was unmistakable. Deep loyalty to his master. And wariness of the newcomer. As Sayo made her way back through the connecting corridor, her heart was in turmoil. Nobuhiro—a cold-blooded warlord of the Warring States. A man with no interest in his concubine. That was what he should have been. But that loneliness in his eyes. It was the same as what Sayo had felt in the modern world. Friendless, misunderstood by family, with only library books as companions. That kind of loneliness. *This is dangerous.* She told herself firmly. Emotional attachment would only hinder survival. In this castle, she must think strategically, act with cold precision. Affection or sympathy toward Nobuhiro could cost her life. The maids surrounded Sayo when she returned to the inner quarters. "How was it? What is his temperament?" "He is a cold man." Sayo answered. It was not untrue. Nobuhiro was indeed cold. But beneath those words, something else seemed to hide—something Sayo could not help but sense. Night fell. In the Eastern Chamber, the faint light of an oil lamp illuminated the six-mat room. Sayo sat on the floor, her knees drawn to her chest. *What has he lost?* Beyond the window lay complete darkness. In the distance, the voices of night watchmen echoed. Takagamine Castle's night was quiet. Nobuhiro's eyes. Beneath that coldness, a deep sorrow concealed. Sayo remembered her modern self. A lonely student life. Days no one understood. The only escape had been to lose herself in history books. *Could he be the same?* The thought took root quietly in her heart. But at the same time, a sense of danger grew. *This is dangerous. I must not let emotion cloud my judgment.* She spoke to herself with severity. To survive in this castle, she needed clarity. Sympathy for Nobuhiro would cloud her thinking. And yet. And yet, somewhere in her heart, Sayo felt her interest in Nobuhiro expanding. Who was he? What had he lost? Why did his eyes hold no light? *Tomorrow, I will observe carefully.* She decided. Understanding Nobuhiro might be the first step to surviving in this castle. The power structure within the walls. His relationship with Zuigetsu-in. Sotaro's complex loyalty. Everything seemed to revolve around Nobuhiro as its center. The moon emerged from the clouds. White moonlight fell across Sayo's face. Her amber eyes caught that light and gleamed. In this moment, Sayo did not yet know. Did not yet understand that her heart was already beginning to waver. That a tightrope walk between emotion and strategy was about to begin. That this very balance would become the most complicated factor in her struggle for survival within these castle walls.