Is a Japanese pop rock duo that formed in 1998 as an indie band. They released three singles and four mini-albums before being signed to Lantis in 2010. Although the core of the band is made up of Kimiko (composition, lyrics, vocals, guitar) and Jun Sasaki (composition, guitar), when they debuted on Lantis in 2010, the band also consisted of bassist Nobuyuki Abe and drummer Shinn. Shinn left the band in 2011, but Yūki Aoyama joined the band as the drummer in 2013. Abe and Aoyama left the band in 2016.
Following the release of their major debut single “Patricia” (2010), they released four more singles from 2010 to 2011; all five were featured on their major debut album Hoshi no Yoru no Myaku no Oto no (2011). Their next three studio albums were Plus to Minus no Shikumi (2012), Namida no Ochiru Sokudo (2013), and Nanairo Megane no Himitsu (2014). After the release of their compilation album Shiawase no Kutsu (2015), they released their fifth studio album Space Echo (2016) and their sixth studio album Pippala no Ki no Shita de (2018).