Though the subtleties of Cesar's changing expression are lost on L and he stiffens initially when the other man puts a hand on his shoulder, the gesture is a kind one, definitely encouraging, and any possibility that he might regret any aspect of what they did together dissipates contentedly.

He notes where Cesar gets his coffee mug, reaching for one of his own and waiting his turn to get a brew he can only assume is strong enough to fuel Cesar's work load. He notices Cesar squinting and very helpfully turns off the kitchen light, failing to consider the implications that might have for pouring coffee.