Harukanaru Toki no Naka de 7

The protagonist is a normal high school girl.

—Or that is what she was supposed to be.

She encounters a mysterious young man named Yukimura Sanada.

A widespread spiritual possession occurs.

When she visits another world to protect everyday life in the modern world, she learns that the world is where she is really from.

The 7th Harukanaru Toki no Naka de game.