Sejun ran a small independent operation, doing what could be loosely called "doing favors for friends" ... friends in high places that from time to time need someone trustworthy for certain missions.  When a clan decided to go rogue and the other clans started building up their armies, Sejun realized he may have to hire or train more agents.

The moment the CEO introduced him as the new "recruit", training to be a vocal, Jaehwan felt a pair of eyes glaring at him.   He would soon find out his name is Taekwoon.  The oldest trainee and default leader, Hakyeon. would later tell him that Taekwoon is also training to be a vocal.   He realized this Taekwoon regarded him as competition.  Not really fond