Yes he is

"You're the thief," Naoto exclaimed. The couple both started to laugh. "Took you long enough to figure out." the boy said. "Maybe people should call you defective prince," the girl said behind her.

"Where did you take all my stuff..." Naoto exclaimed, but she was quickly shut down by the girl

"Nah ah ah, you're in no position to give us that tone," said the girl.

"I've hidden your stuff somewhere now. If you wanna find them, you are gonna have to play a game with us," said the boy. Naoto face grew eery. "Of course," he continued. "You could refuse to play, but I'd hate to be in your shoes when your friends come back to see all their stuff that you were supposed to look after is gone,"

Naoto stood there frozen. She couldn't believe that had been cornered by these teens. How could she have been so blind to just walk right into their trap? But they had a point if she wanted to get all her and her friend's stuff back she had to play along. But on the other hand. They already tricked her once could she trust them to be honest a second time?