Batten Girls.

Batten Girls, also known as Batten Shoujo-tai (ばってん少女隊), is best described as a Japanese girl group based in Fukuoka, which was formed in 2015 by Stardust Promotion. They’re under Colourful Records and began activities on September 30, 2015 with the single Batten Shoujo (ばってん少女。).