After the chaos caused by Q's ability, Q was put back in a cage and his doll was taken away, but, to the surprise of everyone, Mori decided to release Q free and took him to Chuuya’s apartment (Mori took the Q doll as security), saying that it would be a surprise for Chuuya, and for Q to tell Chuuya that now he would be his guardian.
So, when Chuuya returned from the mission, finally thinking that he would rest, Chuuya went to the headquarters of the Port Mafia and when he walked into his apartment and saw Q in his apartment, he froze, and, to put it mildly, was in shock (He did not know that Mori had released Q and even more so, he didn’t know that Mori would force him to take care of Q and that Chuuya would have to become Q's guardian).
Chuuya was silent for a moment, completely dumbfounded, before speaking.
"What the.... Why the hell are you in my apartment...? And how long have you been free at all, Q?!"