A Japanese rock band that emerged in 2018 is known for its secrecy. They never disclosed the names of all members, giving credit to different individuals for music creation, arrangements, and video production each time. The only consistent member is the vocalist, an unidentified woman named "ACA-Ne" (アカね), which means "Akane". Despite limited information, this group has achieved commercial success. Their three EPs have placed 8th, 1st, and 2nd on the Oricon Albums Chart. In addition to their debut year, they were invited to perform at the 2019 Fuji Rock Festival.