“ninelie” is the 9th single by Aimer. It’s her 3rd collaboration with the composer & producer Hiroyuki Sawano. The song was used as the ending theme for the TV series “Kabaneri of the Iron Fortress”.

The title, “ninelie”, can be read as “kyuuso” in Japanese; it’s the same reading as “窮鼠”, which means “cornered rat”. This connects to the idea of being hopeless into a dangerous situation and fighting back regardless of your fear: a cornered rat will bite a cat.