Thanks to boosharwo for fulfilling the bounty at https://e-hentai.org/bounty.php?bid=13996
EnDlsite name is "Ku-on no Ko-on", but I think 久遠の呼音 is better translated as Kudou no Kuon... but I am no expert. If I am wrong, comment and fix by petition.

If you want to see more Utawarerumono stuff scanned/TLed, support the bounties at https://e-hentai.org/bounty.php?search=Utawarerumono&t=&s=

As with any dojin I upload, if any TL is interested in working on it for a bounty, PM me for details.

Support the artist:
http://www.dlsite.com/ecchi-eng/work/=/product_id/RE169278.html
http://www.dlsite.com/maniax/work/=/product_id/RJ169278.html

Artist website:
http://homepage3.nifty.com/yasrin/

Mugi:
http://www.doujinshi.org/book/872904/

E-hentai tip of the gallery:

9) You can turn on many features, including "no ads", and access to more galleries, by acquiring "hath". See the feature list at https://e-hentai.org/hathperks.php , and get your hath from https://e-hentai.org/exchange.php?t=hath

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We are always recruiting editors, translators and proofreaders for EHCOVE. If you are interested, come by the Cove of Translators in the forums and introduce yourself.

(C89) [やすりん堂 (安麟太郎)] 久遠の呼音 (うたわれるもの 偽りの仮面) [DL版]
https://www.melonbooks.co.jp/detail/detail.php?product_id=151434
https://www.toranoana.jp/mailorder/article/04/.../040030380343.html

Base +6, Red of EHCOVE +52