Mameshiba no Taigun (豆柴の大群) is a Japanese idol group. The group was formed on December 18, 2019, through WACK'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 group WAgg. A fifth member, Kaede, who was also a contestant on the show, was added to the group's line-up on December 25. Members: Hanaemonster (ハナエモンスター) Aika The Spy (アイカ・ザ・スパイ)