On July 29, 2015 Reol independently released her first studio album titled "Gokusaishiki", which reached the top ten on the Oricon Albums Chart. Later that year Reol, along with GigaP & Okiku, signed to Toy's Factory under the unit name REOL. On August 18, REOL made their first public appearance in the music video for their single "Give Me a Break Stop Now". They released their debut studio album titled 'Sigma' on October 19, 2016, which reached number 8 on the Oricon weekly Albums Chart.