Brief
Three years passed after the events that once shook the quiet balance of the Shiunji household. The mansion that had always been filled with the noise of seven siblings slowly changed as adulthood began to reshape their lives.
The most unexpected change came from Shion.
Shion had always been the quiet one, thoughtful and observant, someone who rarely spoke unless she truly had something to say. During university, she met someone who slowly became important to her—another girl whose calm nature matched her own. What started as long conversations after class and quiet evenings studying together eventually turned into something deeper.
At first, Shion kept this relationship very private. She was never the type to make dramatic announcements, and she preferred letting things grow naturally. But over time, it became clear that the person beside her was not simply a friend.
One evening, in the familiar dining room of the mansion, Shion calmly told her sisters and their brother that she would be moving out.
The news surprised them, though not in a painful way. Shion spoke with the same composed voice she always had, explaining that she and her girlfriend had decided to live together. There was no embarrassment in her tone, only quiet certainty.
Her sisters reacted in their own ways.
Minami exploded with excitement and immediately demanded to know every detail. Ōka tried to remain composed but asked dozens of practical questions about where Shion would live and whether everything had been properly planned. Banri smirked knowingly, as if she had suspected something long before anyone else. Kotono, after a moment of stunned silence, hugged Shion tightly and told her she had to visit often.
Their brother listened quietly throughout the conversation. When Shion finally looked toward him, he simply nodded and told her that if she had found someone who made her happy, then she should go without worrying about the mansion.
A few weeks later, Shion packed her things.
It was a strange sight—boxes stacked in the entrance hall where countless childhood memories had been made. The mansion had always been crowded, always loud with the voices of six sisters and their brother. Watching one of them leave made everyone realize that time had truly begun moving forward.
Shion did not make a dramatic farewell. She hugged her sisters, exchanged a few quiet words with their brother, and left with the same calm grace that had always defined her.
Yet the mansion did not become empty.
Minami’s laughter still echoed through the halls after her daily training. Ōka still scolded everyone for leaving things out of place. Banri still teased their brother whenever the opportunity appeared. Kotono still sought excuses to spend time beside him.
Life continued, simply with one fewer room occupied.
And though Shion now lived elsewhere with the woman she loved, the mansion remained what it had always been: the place where the sisters and their brother returned, argued, laughed, and continued sharing the strange, complicated bond that had defined the Shiunji family for so long.
The words still linger in the air long after the conversation ended.
Shion leaving.
Not for university, not for a short trip, but truly leaving the mansion to live with someone she loved. It was said so calmly that it almost didn’t feel real at first. Shion had always been the quiet pillar of the house, the one who watched everything without interfering too much. The idea that she would simply pack her things and walk out of the mansion felt… strange.
User remained sitting in the living room after everyone dispersed.
Three years ago, the truth about the family had already shaken the foundation of their lives. Learning that none of them were related by blood had turned the comfortable definition of “brother” and “sister” into something far more complicated. Feelings that had once been dismissed as harmless suddenly carried weight.
Some of the sisters changed in subtle ways after that revelation.
Kotono’s affection became even more open. Ōka’s usual sharp tongue occasionally stumbled when she spoke to their brother. Banri teased more boldly, sometimes watching his reaction with knowing eyes. Minami, though still energetic and carefree, had moments where she looked at their brother differently than before.
Through all of it, Shion had remained… stable. Observant. Almost like someone watching a story unfold.
And now she was leaving.
User leaned back in the chair, staring toward the hallway that led to the bedrooms. Somewhere down there, Shion was probably already thinking about which books to pack first.
It was a strange feeling.
Part relief that one of them had managed to step outside the strange tension that had grown inside the mansion.
Part nostalgia for the years when things had been simpler, when they had all just been siblings running through the enormous halls of the house.
And part curiosity.
If Shion could leave and build her own life… what would happen to the rest of them?
The mansion would still be full. Five sisters and their brother under one roof was hardly a quiet household. Yet something about Shion’s departure made the future feel different, like the first piece of a game board had finally moved.
Whatever came next would unfold inside the same walls where they had all grown up.
The Shiunji mansion.
