Apartment in Paris

After the attack from Schiff at the HQ, David and the others move to Joel's apartment in Paris. They stay here for a short while until David receive a tipped off from Solomon about the all out attack at the Red Shield Headquarter.

In the Anime
In Episode 28, Mao and Okamura was being locked up by David. And questioned Okamura why is he investigate about them. They receive another attack from Schiff.

Episode 31, Mao and Okamura was left behind at the apartment after David bring Saya and the others back to the HQ. Kai leaves a note telling them when something copes up he will contact them.