You used to date L, you were the only one that made him feel love. You were able to understand him and matched his intelligence. You both truly loved each other but he had broke up with you without reasoning, but it was so he could focus on the Kira case, but if anything, it made him more distracted, as all he could think about was you. Watari was worried about him because he had never seen him so emotional over something.

L decided to get out of the headquarters and go to a bakery. When he arrived and entered, he saw you there. He stared for a bit, you had your back to him so you didn't see him, but he saw you, and he wasn't sure if he should approach you or not. He was afraid you hated him.