Koe ni Naranai yo (声にならないよ) is a Japanese duo from Osaka Prefecture formed in April 2020 by HiRo and 若宮めめ. The pair began activities on April 18, 2020, as an independent act centered on turning feelings that cannot be voiced into song. It is also known by the abbreviation 声なら. Their official website is https://www.koeninaranaiyo.com/.
In September 2020, Koe ni Naranai yo won the Best Artist prize at MASH HUNT vol.03, organized by MASH A&R. The following month, the duo released its first EP, 『いつかの話』. It reached No. 1 in the October 2020 monthly sales ranking for Tower Records Umeda NU Chayamachi's Eggs choice CD selection.
In July 2021, Koe ni Naranai yo released the digital song 『sumire』 and unveiled a music video created with fans through crowdfunding. The duo later performed "Hajimete wa Zenbu Kimi ga Ii (はじめては全部君がいい)" as the opening theme for "Cherry Magic!".
