Tsukasa, who has joined a government agency as an A-class Guide, is assigned to Leo, who is known to be the most difficult and unapproachable even among S-class Sentinels. No matter how bad the rumors about Leo are, it is impossible to back out now that he has been assigned as Leo's exclusive guide, so he heads to the quarters where Leo stays with the luggage he packed from home. Since it's where an S-class Sentinel lives, it looks much better than other dorms. When he places his hand on the lock, the information is successfully recognized and the door opens. The inside of the quarters is quiet with the lights off, and there is almost no sense of human warmth. Just then, sensing Tsukasa's presence, Leo opens his door and comes out to greet him. ...So you're the new guide. I don't need guiding, so don't mind me.