look at all the pentagon boys~ hyorae is good friends with ~crescendo and ~urusai who also doubles as her roommate so i think they'd know each other for sure! if he has a connection with ~cuttlefsh, she's pretty much her long lost twin. really, a connection is inescapable lol. hyorae ironically collects illegitimate 'brothers' like pokemon so it would only make perfect sense to add him to the roster.