[4] On September 30, 2014, the duo Pla2me consisting of members Saki Kamiya and Mari Mizuta debuted under T-Palette Records with the single "Plastic 2 Mercy".
[7] On June 1, 2015, Pla2me changed their name to POP (Period Of Plastic 2 Mercy) and four new members: Miki Yamamachi, Yua Yumeno, Ao Shigusawa and Maaya Inukai, joined the group.
[12] On July 20, Ao Shigusawa withdrew from the group as her family did not support her musical career.
[20] On April 17, two new members, Usagi Tsukino and Haruna Bad Chiiiin joined the group.
[25] Their eleventh single, "Brand New Parade", was released on April 17, through Fueled By Mentaiko marking their major label debut.
[27] On January 3, 2020, Saki Kamiya announced that she would leave the group at the end of their first hall tour.
[28] On January 29, the limited distribution double A-side single, "Namida no Stage / Fix Your Teeth", was released.
[30] On March 28, Gang Parade split into two groups: Go to the Beds, consisting of Miki Yamamachi, Yua Yumeno, Can GP Maika, Yui Ga Dockson and Coco Partin Coco, and Paradises, consisting of Yuka Terashima, Usagi Tsukino and Naruhaworld.
On May 22, Saki Kamiya left the group via a livestream instead of the concert scheduled for the same day because of the ongoing COVID-19 pandemic.
[32] On January 2, 2022, Gang Parade resumed activities with the addition of Kila May, Ca Non and Changbaby as new members.
[4] On March 26, it was announced that two new members, Ainastar and Potential (then known as Tantan), would join the group on May 13.
[34] On May 25, they released the compilation album, Welcome to Gang Parade, consisting of previously released Gang Parade, Go to the Beds and Paradises songs with updated vocals by the new thirteen member line-up.
[48] They released the digital singles, "Yakudō" and "Rock wo Tomeru na!!
[56] They released the single, "Sparkling Moon / Good Luck My Future", on December 25.