A seven-member group consisting of Yumeka Naukana?, Nazena, Mog Ryan, Matilder Twins, Wonker Twins, Chichichichichichi, and Liontown.

She was unveiled fully masked on the final day of the WACK Joint Audition 2021, a training camp-style audition held in March 2021.

She made her debut in May 2021 with the release of her first album, "ANAL SEX PENiS."

Starting with the "ACOUSTiC SAD ORCHESTRA TOUR" which began in May 2022, the band has become a seven-member group, with the addition of new members Chichichichichichi and Liontown.

On August 27th, a one-man concert will be held at Hibiya Open-Air Concert Hall.

They made their major debut on August 31st with Avex.