It's good to not treat others like they are liars.
Nagisa listens to his coworker's explain that they didn't eat Nagisa's lunch.
Nagisa wants to respond to his coworker.
Nagisa asks his coworker to aid his search at finding the lunch eating culprit.
Nagisa says that he doesn't believe his coworker and demands repayment for lunch.
Nagisa's coworker is praised for his detective skills when he figures out the identity of the thief.
Nagisa's coworker breaks down crying in the break room.