Glassy Sky is a song used many times in Tokyo Ghoul. It was composed by Amanda Lee This is the piano version performed by Theishter - Anime on Piano
https://www.youtube.com/watch?v=nHONksx5R_0&index=2&list=PLYxaYu4iIN_0KzK2AByYKyprKvPoq7Vx7 This is the audio
