And So Hope Was Lost - S2.E7

As Henriette's patience with Milky Holmes finally snaps, she leaks to the news that Arsene is planning to destroy Holmes Detective Agency. Later that night as everyone is gathered outside, Arsene appears, using her illusion Toys to make everyone fight each other. As she announces her plans to leave Yokohama, the Gentleman Thieves fight against her to stop her, but to no avail. She defeats the thieves and proceeds to destroy the academy, leaving Milky Holmes and everyone else behind.