Kenshi Yonezu & Masaki Suda - Gray and Blue (灰色と青)
by Kenshi Yonezu
Still now I sing...
Track 14 on Kenshi Yonezu's fourth album, BOOTLEG.
Original video: https://www.youtube.com/watch?v=gJX2iy6nhHc
Lyrics: http://vgperson.com/lyrics.php?song=grayandblue