Zhou Sandy and Mandy are Chinese twin sisters. The two were always alone. They were adopted when they were 11 years old and now they are 13 years old. They have an older brother, Tao, but they aren't blood related. Because of their parents work, they are sent to Korea to live with their brother they have never met before. Tao is a Kpop idol in Korea so the girls have only seen him on TV. The thing is, Tao never knew their existence until they came knocking on his door! What is it like being EXO Tao's younger sisters??