WAIT i didn't realise HIM sold so well what caused their sudden rise?
I don't really follow them that much but from what I know they doubled their promotion schedule. They held fan signs / meet & greet, they fly to japan back and forth and does showcase on different cities (they're still promoting in Japan currently ) and they also became more engaged on social media. Most of their fans are from Japan so I'm guessing that's where all the GAON bulk sales came from.