Akio and Yuka meet, and exchange numbers. Akio's phone gets stolen. On Yuka's way to meet an ex-student, the reason she was fired, she bumps into Akio at the school. It disappears in an earthquake. Sho is inside, his girlfriend Kaoru out.

Everyone realizes that the school is surrounded by almost empty desert. Yuka sets out to find her ex-student Ryuta to reassure him. Akio sets out after her. The others find a mysterious object.