Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
The main character, Takuya Arima, lost her mother in her childhood, and her father, a historian, also died in an accident two months ago.
The last summer vacation of all high school students.
One day, a parcel containing a strange object with a round mirror and a glass ball of no known use is delivered.
The enclosed letter says that her father is still alive!
「 At 10 : 00 tonight, take this object and go to Kennomisaki (Mt. Misumi). 」
Follow the directions and head to the place where the mysterious woman was lying down.
The principal and the mysterious transfer student are there.
In a moment, they are wrapped in light with the echoes of the earth.
The journey through the parallel world begins now.