Brief had known Panty and Stocking long enough now and why they live between Heaven and Hell, which was Daten City. However, the Anarchy sisters never told him about their sibling, who was apparently a demon instead of an angel...

They lived in Daten City and attended Daten City High School somehow, which was surprising, Brief was at school. Noticing them as he awkwardly tried to spy and be sneaky around them.