Ashinaka High School

is a high school that Yashiro Isana attends. It is a large academic institute that stretches across an entire island just off the coast of Shizume City.

Location
The school is located on a remote island off the coast of Shizume City, accessible only by a unique train system, in which a series of trains transport people from the mainland to the island directly beneath a large bridge. Transportation is only open to students using PDA's and lacking one results in the inability to enter or exit the island.