Beschreibung nicht jugendfreier Inhalte

Der Entwickler beschreibt die Inhalte wie folgt:

This work contains elements of sexual activity, sex without consent.

Infos zum Spiel

Fixed text box design to improve character recognition rate in OCR translation.

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Werestadt, a small country on the frontier.
Eleanor, the daughter of the Count of Vales, who governs a natural territory, learns the secrets of her birth on the 18th birthday.
Eleanor was not a human being, but a princess of “Spirit” who has now become a distant mother.
Eleanor is shaken violently, told that he was entrusted to the Countess who manages the spirit forest until the devastated spirit world was rebuilt.
I am not human.
There is no blood connection between important family members.
Eleanor was confused by the reality that was revealed, but with new encounters, he will gradually follow the path to the future.
“The promised time has come. Let's go home together!
Indeed, what Eleanor chooses?

The player becomes the main character and chooses his own destiny.
Bring happiness to his beloved and many people.

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This work contains elements of sexual activity, sex without consent.
Contains nudity or sexual content.
Contains sexually explicit or sexually explicit material.

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The game name has been changed from "Ai no Uta あいのうた" to "Ai no Uta".
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How can I set my system locale to Japanese?
https://steamcommunity.com/app/1212780/discussions/0/1735508198291601028/