After insisting on monogamy from Juin while they're sex buddies, Sorn still welcomes Penny's advances, and it messes with Juin's head. On one hand, Sorn can be very generous with his time, like driving the interns to the factory, then there is the side where he pranks Juin in the office, getting him in trouble with their manager, P'June. Champ's concerned enough about the office prank to mention it to Tai. (Source: Italophilia at kisskh)