They were using the terminal building to leave the airport. They could travel through the deserted facility however they liked without anyone yelling at them, but the path intended for this purpose had to be the easiest one.
An electronic alarm began to sound.
“Hyahhhhhhhh!? Wh-what, what, what!?”
“Ah ha ha! It’s okay, Index. It’s just a gate alarm. …Wait? A gate?”
Kamijou laughed, but then the smile froze on his face.
It was hard to tell with no one at the reception desk and the lights out, but what gate had they just walked through without permission? Stiyl and Kanzaki didn’t seem to care as they continued on ahead, but Kamijou rapidly grew nervous when he looked alternately between their leaving backs and the gate he had just passed.
“U-um, Othinus-san? Please tell me that doesn’t say what I think it does.”
“Try studying the language before traveling somewhere. That is the immigration control gate. Welcome, illegal immigrant, to the land of freedom where anything goes.”
“Oh, no, no, no, no!!”
“Give up. The three second rule only applies to food. Hurrying back through the gate doesn’t erase the crime you committed.”