The first release from SixTONES in their sixth debut anniversary year is a double A-side single. "Ichibyo," a Nippon TV 2026 athlete support song for the "Milano Cortina Olympics," is a song that reflects the efforts stacked without wasting each second, the days of struggle and tears, and delivers encouragement to everyone pursuing their dreams, wishing that the countless accumulated "seconds" shine as confidence and strength. In addition, "Rebellion," the opening theme for the Nippon TV Sunday drama "Punch Drunk Woman - Dakoku made Ato xx-nichi -" featuring Jesse, is a dance-rock tune that combines thrilling intensity reflecting the prison break suspense setting with a sense of speed that expresses the protagonist's emotions as they try to break free from a feeling of confinement. In addition to the two title tracks, the Limited Edition includes CD versions of previously released unit songs newly performed by all six members. The Limited Edition Type B DVD includes the music video making and dance performance version of "Rebellion." It comes in a sleeve case.