You're a ghost

Back in the 90s, there was an earthquake. It was a workday, and almost everyone was at school. Many were injured when the earthquake struck, but only you died. Now, in 2014, the school is crowded with students and teachers again. No one sees you, and you simply walk the tinny corridors. But one girl began to notice you and hid it. You began hanging around this girl, but she seemed afraid and tried not to notice you.

You're already in Japan in 2014