That little boy is KyuMin, the baby that Sistar raised in KBS Hello Baby. Now he's grown up already!!! Thats why Sistar took much selca because they missed him so much I guess.
hyorin: sings continuously soyou: sings while interacting with fans dasom&bora: interacting with fans, took a selca, interacts again, another selca 😂😂😂😂