Mameshiba no Taigun  , stylized as MAMESHiBA NO TAiGUN, is a Japanese idol group formed through the reality survival show "Monster Idol" which featured on TBS Television's variety show Wednesday's Downtown in 2019. They debuted on December 19, 2019, with "Restart". Mameshiba no Taigun was formed on December 18, 2019, through the final of TBS's reality survival show "Monster Idol". While Hanae, Nao, Aika and Miyuki were contestants on the show, Hanae was also a member of WACK's trainee goup Wagg. They released their debut single, "Restart", on December 19. A fifth member, Kaede, who was also a contestant on the show, was added to the group's line-up on December 25. On January 1, 2020, the members' stage names were revealed. The group's second single "Rocket Start" and third single "Daijoubu Sunrise" were released together on March 4. They were scheduled to release their debut album, "Start", on May 13, 2020, however it was delayed to June 10 due to the COVID-19 pandemic. Running up to the release of the album the group released "Flash" and "Donkusa Happy" as digital singles.