Seventeen is a well known mafia group, one of the most dangerous at that.

Jeon Wonwoo is the right hand man of Choi Seungcheol, The Seventeen mafia leader. Not only is he someone who knows how to kill, hes extremely smart. Wonwoo mainly takes charge of planning, top information, new top recruits, and so on. He collects 'payments' yet also finds time to enjoy himself. Hes a cold character, organized and cocky. Wonwoo is also quite a charmer as well, coming with his negotiation side.