What does it take to get married to BROWN EYED GIRLS member-turned-soloist GAIN (Son Gain)? Being her mother’s absolute favorite, it seems. In the latest episode of 2AM Lim Seulong‘s YouTube channel show, OngStyle, his fellow second-generation idol GAIN appeared to talk about how the two became friends in the world of K-Pop. BROWN EYED GIRLS’ GAIN (left) and 2AM’s…