Editing Hagure Yuusha no Aesthetica:Volume 4 Prologue (section)

===Part 1===
Soft sunlight filtered in.

The rays of the sun spread their comfortable warmth, announcing the coming of spring. Gentle wind blew into the room from an open window, making the white lace curtain flutter lightly.

A self-governed region established to manage the returnees from alternate worlds. On the sky of the giant manmade island built by refilling a portion of Tokyo Bay, the cloudless weather gave the feeling of spring.

However, in contrast with the comfortable weather, a heavy atmosphere enshrouded the Ousawa residence.

The reason was the silence that fell into the living room a little while before.

...... Good grief. 

Ousawa Akatsuki sighed in his mind.  Right now inside the room, there were four people including Akatsuki.

Akatsuki and Miu, who live in this house.

Also their friends Izumi Chikage and Doumoto Kuzuha.

“........................”

Akatsuki, leisurely laying back on the couch, looked at the girl sitting beside him.

The name of the girl prone to cast her eyes down was Ousawa Miu. The name belonged to Akatsuki’s little sister.

However—the girl that was now over there wasn’t Akatsuki’s little sister.

Akatsuki was summoned to the alternate world Alayzard, as a result of his hardships became a hero, and defeated the Demon King Garius — From Garius, right before his death, he was entrusted with his only daughter.

Myuu<ref>Pronounced 'mew'.</ref>. That's her true name.

And after the Demon King Garius died, judging that she was in danger, Akatsuki brought her back to this world. Bestowing her with the name of his sister who was no longer around, they started living together. Meanwhile they attended school at the Babel organization, which had been established with the aim to manage and train the boys and girls who returned from alternate worlds.

Yet, that didn't mean all problems were solved. If those around them got hold of her being an inhabitant of an alternate world, it would be problematic, and from the start they had a relationship of being a hero and the daughter of the Demon King. To Miu, Akatsuki was her father's enemy. Properly speaking, he was the target of a hatred that absolutely could not be forgiven.

—Living together despite that, while learning about each other, in time trust sprouted between them. Then a pursuer was sent from Alayzard and attacked Miu.

Phil Burnet. He was a human of this world summoned to Alayzard, ironically to be the youth that was to become the next hero after Akatsuki.  At JPN Babel, which Akatsuki and Miu attended—there, during the Ranking Tournament, a death match against Phil ensued. Despite Phil having formed a contract with the Evil Dragon Zahark, a lifeform from a higher plane, Akatsuki still defeated him. Furthermore, during the battle, even though Miu gave up her own life so as not to involve the people around her, Akatsuki's strong persuasive skills freed her from her despair.  In the end, the trust between them became deeper.

—But in contrast, this most likely caused others to notice that Miu held some sort of secret.

Especially, the ones who were in their same team at the ranking tournament, Chikage and Kuzuha, as they in fact engaged in combat against Phil, they knew that Phil's goal was Miu. At least to these two, due to the facts stated above, it was impossible to keep the secret from them. 

Because of that, at the end of the Ranking tournament, after coming back home from the seaside park.

Akatsuki made Miu make a decision. Whether or not to disclose her secret to Chikage and Kuzuha.

Thereupon, after a struggle Miu made a decision. <!--"She decided" is omitted -->To reveal her secret to those two. 

For that reason, Akatsuki got in touch with Chikage and Kuzuha. In order to confirm their intentions.

—Don't tell anyone. It's a life or death matter. Miu's hidden secret is that big, so it's serious. Even so, it may be you want to hear about it.

You will hear Miu's secret from Miu herself.—

To Akatsuki's question "What will you do?", both Chikage and Kuzuha sent the same answer. 

An immediate reply. Both of them said just the words "I'll come." 

The next day, just a bit after noon, Chikage and Kuzuha turned up at the Ousawa home. 

—And so, we arrive at the current situation.