Brats (stylized as BRATS) is a Japanese all-female rock band formed in 2011 by sisters Rei and Aya Kuromiya. In 2015, guitarist Hinako became an official member of the group. The band released their first full-length album BRATS in 2018, which contained theme songs from the anime series To Be Hero and the Japanese film Slavemen. History Brats was formed in Tokyo in August 2011 by sisters Rei Kuromiya and Aya Kuromiya, when they were 10- and 12-years-old, respectively. The band name was chosen by Rei because of her "brat"-like personality. On August 15, 2012, Brats released their first demo CD "Gangan Do it!" on the same day as their first performance at Shibuya Club Quattro. On August 25, they received a special award in the 634 Band Contest at Azumabashi Fest. On May 3, 2013, Brats performed at Imax Live 2013 held at Ikebukuro's RUIDO K3, and held their first solo live show on August 11, 2013, at the same venue. On April 10, 2015, they released their independently produced first single, "Misery". On November 21, 2015, Brats released the music video "14-sai-byou" ("14-year-old disease"). The song, produced by Urbangarde's Temma Matsunaga, featured the band performing in techno-rock style connected to religious, lolita, and horror imagery, but Rei later stated that she felt the song and its video weren't true to her vision of the band: "It's what Temma-san felt Brats was, and we jumped into the world of Urbangarde." The band paused activities in March 2015, and Rei Kuromiya temporarily joined the group Ladybaby, continuing through November 2017. On December 24, 2016, Brats posted a teaser image on their website with the date "12.27.16", and 3 days later, on December 27, Brats revealed their new hard rock style in the music video "Ainikoiyo", the opening theme from the Japanese anime To Be Hero. Rei explained the decision to move in a hard rock direction was rooted in the band members coming of age: "Now, the three of us are a bit older and we can express more of our own opinions, like 'We want to rock more!' We feel confident about our direction, so we have no doubt about our future." On March 29, 2017, Brats returned to live performances with the free solo concert, "Reborn", at Ikebukuro's Live Inn Rosa, their first live performance in over 2 years. At the show, they announced the upcoming release of