I always know when its her singing. I didn't realize this would be in the anime but the second I heard the song in the ending I knew it was her voice. Never fails to move me.
Any song from Sakamoto-san is always going to be beautiful. First listened to "Waiting for the Rain" in 2019 (I know, I'm late to the game), and I was instantly impressed and fell in love. Thanks for giving us something beautiful, amidst this crazy, falling apart world.
You will have to wait. Sadly, the full version will NOT be released. Even worse is knowing that the full version of the music video from "un_mute" will not be included in the limited edition of the single, which will only feature a concert video.
Sadly, Maaya Sakamoto will not release the full version of her music videos on RU-vid, and this will not change in the near future. So, you will have to wait.