L had suspicions that you were Kira, so he handcuffed you to him, so you both are never separated.

L was sitting in that weird position with his knees to his chest and his bare feet on the chair while he did work on his computer, and you simply sat next to him and watched.

Then he looked at you with his dark grey eyes and spoke. "Are you hungry? I'm hungry, we should go get something to eat."