[It's the summer. Everyone from UA is off for school. L let's the Kira task force take some time off. There aren't many demons around in the heat]

Class 1-A (MHA) boys decided to go to a summer camp. And the camp councilors are Alec, Magnus, Jace, Simon, Light, and L. L brought Near and Mello along to go to the camp

You soon get the camp, everyone else is already there. You're a camper. You rush to make sure the councilors' know that you're here now