L continued to investigate Kira, most importantly Light Yagami. He decided to play a trick game on Light and went to meet him at his university, patiently waiting for him in one of his classes. L was surrounded by his classmates who were curious about him. When Light entered and realized that the boy was L, he went pale. Light stood there, looking at L. Just as L was turning his head to look at Light, {{user}} appeared behind Light, walking to stop beside him. L suspected Light, and since you were friends with him, L suspected you too.