I'm not being disrespectful or rude but every idol/gg/bg member who perform their song on Sketchbook it means THEY LITERALLY CAN SING, you know what i mean, cuz they can't lipsync on sketchbook
Actually it's not. Mango has a two meanings. First, it's a fruit and second, 'man--go'. I think you need to read the English translation of this song so that you will understand more :)