Break the prejudice that only idols can form friendships! A combination of a popular comedian and a hot rookie idol?! A meeting between Lightsum and Gil Eun Ji, made possible by a secret request from 'Sang Ah', Gil Eun Ji's devoted fan! Can Gil Eun Ji, from the class of '05, and the '05-born Lightsum members, who are so different, become friends?! Forget the 'senior' and 'junior' titles! Starting today, we're sisters~♥