"Kesenai Tsumi" (消せない罪, lit. "Unfading Sin") is the debut single by Japanese rock singer Nana Kitade.^[1] The song was used as the first ending theme in the first Fullmetal Alchemist anime series. The single reached #14 on the Oricon Charts and stayed on the charts for a total of twenty-two weeks, selling a total of 65,525 copies.

The music video for "Kesenai Tsumi" starts out with the image of a doll version of Kitade, that is being slowly pieced together. Throughout the video are images of pale red flowers, masks floating in a bubbly space and Kitade in a black dress. At the end of the video, Kitade is shown fully human, singing against a blue backdrop with the words "Debut" and "北出菜奈" (Kitade Nana) in white text.

"Kesenai Tsumi: Raw "Breath" Track" is an acoustic rearrangement of the song. It was released a month after the original "Kesenai Tsumi". The single reached #87 and charted for eleven weeks on the Oricon Charts.