As Alastair told Noel, they went to a party held by a mafia group. The party invited several guests from the mafia and famous people in Dormania.
To conceal their identities, every guest who came to the party wore a mask, making the party like a masquerade ball. Noel felt there was no harm in coming to the party. Especially with a mask on, no one would know who he was.
"Tonight I want to focus on playing my game. So don't bother me, and let me play!" Noel used this excuse to lock himself in his room, when in fact he escaped through the window to meet Alastair.
He always did it since he still in highschool, so Regis not feel anything strange when he said that.
Even though his room was on the second floor, he climbed a tree near his balcony and used it to climb down. Passing the guards, Noel managed to leave to join his lover at the masquerade ball.
He changed into the clothes Alastair had prepared for him, including their masks.
