When Sierra was 17 years old, she was welcomed by the White King's Knights.
　After the customary ceremony held in the throne room, what awaited Sierra as she ducked through the doors of the White King's Knights' headquarters?

''Welcome to the White King's Knights!

　Sierra's face was smeared with white pies shortly afterwards as she opened the door with a small, enthusiastic "Okay" in front of the room and cheerfully opened the door.
　She didn't know what had happened, and she couldn't move, stunned by what she didn't immediately understand.

　To his right was the figure of Oliver Joe. He was wearing the white robe of a White King Knight.

''Sierra, welcome to the White King Knights' headquarters, welcome!

　Then he is greeted with a funny sounding whistle beeping.
　To his left is the figure of Lade Black.

''Geehahahaha, that's just the way it is, Sierra. I'll have no choice but to congratulate you on joining the White King today!

　He laughed so hard that he cried on his stomach. When the pie stuck to Sierra's face fell in a blur to the floor, Lade laughed even more.

''Nah, what's with this knightly buoyant scene...''

　Sierra was appalled at the room, which was decorated with many colorful decorations.
　Her sister Hilda, standing next to the table, said, "I told them not to do it, but Oliver and Lade said they should definitely open it...

Open?

'It's your celebration, of course,' said Lade. 'I mean, how long are you just going to stand there, come on in, have a drink first.

　Lade hands Sierra a mug of razz beer.

'Oliver, I'm going to tell Anna that you threw a pie in my face,'

I really don't want to hear that.

　Sierra laughed, "I'm just kidding," she laughed, as if she wasn't even aware of it.

　First place in the pecking order, Oliver Joe.
　Second in the pecking order, Daniel King.
　Third in the pecking order, Hilda Eckerlert.
　Fourth in the pecking order, Lade Black.
　Fifth place in the pecking order, Edward Scotch.
　Pecking order, sixth place in the pecking order, Emily Anderson.

　And the newly welcomed seventh place in the pecking order, Sierra Eckarlato.
　Each had already raised a mug.

'Have you all got your mugs!

Oliver's voice made us all go, "Oh! I reply.

'Alright, then, once again. Sierra, congratulations on joining the White King!

　There was a kerning, a lilting sound of mugs playing together.
　That's when it happened. A light source appeared in the middle of the room. The light source suddenly assaulted us all, and each of us shielded our faces with our hands as if we were dazzled.

　After the light subsided, they looked into the room and saw a mysterious mirror. They all forgot to put down their arms, which were holding up a mug in front of the mirror.
　In front of that disastrous and somewhat nostalgic antique looking mirror, they said, "What, an attack? And the raids turn their focus outward. But there's no change in the air inside Razhuisen or in the waves of magical power floating around the city.



　Suddenly, it was Sierra's name in the mirror. Each of them stared at Sierra as if they were looking at something strange.

''Yes, I see it.''

　No one could see the young man's reflection in the mirror but Sierra.

'Hey, what's up, Sierra,' said Oliver. 'Can you see anything?'

　The room was tense. Then the door of the room suddenly opens, "Oliver-sama! And some kind of restless message appears.
　Oliver gets an irritated look on his face.

Shut up, I'm busy!

Excuse me. There's a delegation from the Principality of Demons here to see you!

What?

　The incomprehensible events that were happening in rapid succession left Oliver with his head in his hands.

'What in the world does the Queen of the Great Forest want with a small country...'

　As if in an uptight mood, the transmission order said.

'The White King's Knights are to assemble in the throne room! --


*


　At the same time, the mirror appears to Sufilia.
　At the age of 17, she was standing beside her father--Frederick's throne and was involved in the national government of Artemias.

''From the Principality of the Duke of Demons, the Minister--Ignotus Rosev-dono is here to see you!

　As the great door opens, Ignotus walks down the red carpet in the center and emerges. Next to him on both sides are his entourage - Felsen and Bishas.
　Ignotus maintains a good distance from Frederick, who looks down from his throne, and bows politely. Frederick lowers his cold gaze and asks, "What does the demon race want with Artemias?

'Thank you for granting me an audience. My name is Ignotus, Minister. I am here to meet His Highness Sufilia.

　King Frederick asks with a disgruntled tone in his voice. 'What do you want with my daughter?'

　That's when.
　Just now, the light source appeared in the space that Ignotus had moderately set up - the space between the throne and Ignotus.
　Frederick blocked the light, wondering what was going on. Ignotus muttered and grinned, "Right on schedule.

　One by one, Sufilia's feet slowly descended the platform. As if drawn to that disastrous yet somewhat nostalgic mirror, he gently approached and touched the edge.

''........Who are you?''


*


　Six years before Sierra and Sufilia received the World Mirror, Nem was born in the land of Anorferia.
　She was four years old when the World Mirror appeared to her. It was while she was being trained in the garden of a house she was used to living in by Minerva in the Cat Fist - and she said

'Mimi, I don't want to practice cat fist anymore.

"Nem, the Cat Fist is the traditional martial art of the White Cat tribe, and you can't call yourself a White Cat if you don't learn it.

Nem turned away, "Then you won't say your name. When Minerva made a troubled face, "Nem........", she gave an innocent smile.

''Minerva-sama!''

　At the gate of the civilian house, the guard of the Inu tribe - Kayu's figure was visible. Minerva gave the two strangers who appeared next to her a sharp look out of habit.

'Kayu, how are you over there?'

　One had red hair. The other had light pink hair and seemed to be still a child, though not as much as Nem.

'We are pleased to have you from the Principality. This is Minister Cassandra-sama.

Minister!

'Yes. And here's.....

My name is Toatrica, and I am the Demon King's sister.

The Demon King's?

　Minerva was upset by the sudden visit, not in the Beast Country, but in person during her stay in Anorferia, and even more so by the fact that it was the sister of the Minister and the current Demon King, and she was upset about what was going on.

　And that's when Cassandra was about to step into a brief conversation.
　Minerva felt a blinding light at her back and turned around.
　There was Nem standing in the garden, and she was staring into that disastrously nostalgic mirror.



*



　It was eight years ago before Nem received the mirror--.

　In the great garden of the Demon King's Castle, there was a young, little Toatrica.

''Sister, what was that?''

　The pale pink head popped out of the white flower garden and she looked curiously in the direction of the spacious white terrace on the border of the castle and gardens.
　Beside her was the figure of her sister Rosalia, which was a perfect match for Toa's grown-up form.

'What?'

Look, there's something over there!

Where is it?

　Rosalia checked the direction Toa was pointing.
　It was a single large mirror on the terrace.
　The Toa came hand in hand with Rosalia to the front of the mirror. The fine mirror gave off a sense of misery and a sense of nostalgia.

''This is........''

　Rosalia was confused and hesitantly gently touched the mirror. Toa looked at the mirror as well. He looked up at Rosalia's profile in wonder.

'Sis, is this our father's?'

I don't know.

　Lucius and Electra could be seen inside the castle with a view of the terrace. They had apparently visited the gardens, and next to them was the figure of a human-shaped carpent.

''Lucius, is that your daughter?''

Yeah, Toatrica and Rosalia.

What's that for me?

What are you talking about?

Isn't that so? Then what is that, your little bratty son of a b*tc*, looking for something.

　Lucius and the others noticed something strange and rushed over to him.
　When they get to the mirror, Lucius is alerted to the area.

This is..... Rosalia, take care of the Toa.

　First, he pulled Toa away from the mirror. Then, like Rosalia, he traced the edge of the mirror to make sure it was the same as Rosalia's.

''--Who?''

　It was then that Toa asked the mirror.
　Her eyes were fixed on her reflection in the mirror.
　It was an uncanny sight and the whole group fell silent.

'Toa, what's wrong?'

　Rosalia looked into his face with concern, but

Who are you and why are you there?

Toa, what are you doing? !

　Rosalia's hue changed. It was because Toa was talking to the mirror and was so engrossed in it, as if he had been taken out of consciousness. He grabbed her by the shoulders, but she didn't notice as her body only shook. He doesn't take his eyes off the mirror. He doesn't respond to Rosalia's voice. She didn't respond to anyone's voice.

'Wha, what's this light?

　Suddenly, a blinding light was emitted from the mirror that hadn't responded in any way. Lucius reflexively covered his face with his arms, and Electra and Carpent blocked the light as well. Lucius told Toa to move away from the mirror, but the glare of his vision was too much for him to do so.

　The light enveloped the Toa and Rosalia.....

　A moment of time that the light created. In that white world, the Toa and Rosalia were there.
　There is a world mirror in front of me.

''Why are you in that place?''

　Toa could see it. He saw a young man staring at him from the mirror.

　The young man said, "Toa.

Toa," he said, "you may not know it yet. You may not know who I am right now, but there will be a day when you will find out who I am. But when you find me you must not get involved.

　The young man's tone of voice was tinged with loneliness. And he was trembling.

'Who are you?'

You'll see. It's no one else. It's a stranger.

　Toa and the young man looked at each other as if they already knew each other, as if they were nostalgic.
　But Toa wasn't the only one who could see the young man.

''What in the world does this mean...?''

　The young man noticed from Rosalia's reaction to that. Then, a little surprised, he muttered, "Opportunity.

'Miss Rosalia,'

What ... how do you know my name?

'I'll find out soon enough. But I didn't expect Rosalia to see it too. Maybe that's how close she was to Toa's soul........ Now, please put your forehead on the mirror. And the Toa too.

You put your forehead in the mirror? And Rosalia.

'There's something I want to tell you both, something I want to show you. That's hard to convey in words, but it only takes a moment to show them.'

　It was Toa who put his forehead on first. 'Is that right?' And Toa didn't hesitate.

'Yes, that's fine. Come on, Rosalia, too.

Wait a minute, what the hell do you have to show me?

' ... everything. I'm going to show you why I met Toa, fell in love with her, let her die because of me and why I'm in the mirror now, all of it.

　The young man's tone was calm. His expression was kind. There was not a hint of cloudiness, but it could not be said to be clear. There was always a sense of loneliness somewhere in the air.

　Rosalia lined up next to Toa and placed her forehead softly on the mirror.

'Thank you...'

　The young man laughed quietly at that.







Rosalia, get the Toa away from the mirror!

　As soon as the light converged, Lucius said to Rosalia beside her.
　But she didn't move immediately, so he had no choice but to try to pull her off himself.

'Masamune!'

　As if reluctant to leave, Toa reached for the mirror and screamed in grief.
　He crouched down, looked at Toa, and

Toa, can you see anything?

　But Toa doesn't answer. His gaze is not on Lucius, but on the mirror.
　When he visits again, Toa's gaze moves slowly, "Father? I replied.

'What's the matter, is there someone in the mirror?'

Mirror?

Yeah. Didn't you just talk to someone?

　The Toa didn't answer as if he was out of it. It was strange, but somehow Lucius felt like he was after a period of grief, even though there were no tears in his eyes.

　As his attention was distracted, Toa's gaze looked in the mirror again. Then the pessimistic look on his face began to smile thinly.
　Lucius worried that it was odd. But he saw something even stranger than Toa, and he was even less sure. Rosalia was holding her mouth in her hand and tears were streaming from both eyes. It looked like she was just trying to hold back the overflowing sadness, and I was confused as to what the hell had happened.

'Rosalia ... toa ... what the hell happened?'

　Toa muttered in a young voice.

'There's no one there,'