No release date, platform or region has been announced yet. Source: Official announcement
Miyu Irino, portraying the character Sorano Kakeru, recorded a special cover song titled 'Hitohira', originally performed by Motohiro Hata. This session was uniquely directed by Hata himself, bringing a new rendition of 'Hitohira' to light. The official announcement reveals a snapshot featuring the two artists together during the recording, emphasizing Hata's detailed guidance.
announced by the official Love Unseen Beneath the Clear Night Sky website
Official source: sh-anime.shochiku.co.jp