Name of the song: Ailes Grises
Album: Hanenone | ハネノネ
This is the highest possible quality recording I could get my hands on and I optimized the sound settings for youtube. The album cover was upscaled (using fancy AI) to look better.
Buy the album here: https://www.discogs.com/Kow-Otani-Haibane-Renmei-Soundtrack-Hanenone/release/1044556