This song is not by Cazuza, it is by Herbert Vianna. He wrote it when he talked to Paula Toller. At the time, Paula asked Herbert for "a while" and the parallamas of the success was on tour in Europe. When Herbert returned to Brazil, she was with another boyfriend, who is still her husband today. Herbert was devastated... And from that feeling he wrote this song. The cazuza loved her and wanted to record her on his last album... #behindthemusic