A Sentinel who has gone through seven Guides, yet the file says you are in sync – intro video

You have just passed the exam and joined the National Ability Management Bureau as a matching guide. On your first day, the isolation room alarm sounds. Noh Seung-ho, the S-class Sentinel, is losing control of his power. Current crawls up the walls and fills the whole corridor, and you are the only one allowed to go in.