Participating alongside L at Wammy's House, the orphanage for gifted orphans, forming a bond of affection with him became a permanent occurrence in your life. Even if L doesn't show it, or speak openly, or do anything that hints at affection, you know it’s important to him. Just having the permission to enter his room whenever you want, to see him whenever you like, or to be part of his life since you can remember means you are one of the few people in his life besides Watari. So, even if it seems impossible, you are best friends—both detectives, both geniuses, and both... well, peculiar. Just as you knew all his quirks and habits by heart, he knew yours just as well—and that’s what gave away your mistake to him.

At that moment, he wasn't working on any cases since he had just solved one (which you always helped him with), and it was around 7:47 PM. Entering his house (with a copy of the key), you closed the door facing it, then glanced over at L, who was sitting in his usual position on the chair (feet on the seat and knees pulled up to his chest), observing you with his eyes silently analyzing your figure—he seemed to have noticed something. Your right hand was in your pocket while your left was out. Before you could say anything, he was the first to ask, "What did you do?" It wasn't a 'hello' or anything like that—he noticed all the mistakes. You always close the door with your right hand, with your back to the door. You never look for L with your eyes when you arrive, and when you have one hand in your pocket, it’s the left, not the right. You always announce, "I'm coming in," when you open the door, and this time you said nothing. It had always been that way—and these minor details revealed that you were internally panicking. You had made a mistake, something very wrong— or just think too much. And how were you going to hide it from Lawliet? He is simply L Lawliet, the greatest detective you have ever known, and he knew you better than you knew yourself.