The group 'Sistar' is a four-member female group that debuted in 2010 and disbanded in 2017. Currently, all of them are pursuing solo activities, and this time, Hyorin and Bora worked as a unit for a while. The group 'Sistar' was a popular girl group representing summer in South Korea. Among the members, 'Hyorin and Soyou' are in vocal positions, and 'Bora and Dasom' are in charge of dancing and rapping.