It is the Tenpo Era, 1830. Jinta runs away from home with his half-demon younger sister Suzune who was being abused by their father. Not long later, the pair are taken in by Motoharu, a guardian from the nearby village of Kodano. When their Miko "Itsuyuki" servant of the Fire God is slain by a demon, Jinta decides to take up the role of...

One day Lain Iwakura's class receives an email presumingly from one of their late classmates, after she had committed suicide. Usually she wouldn't even use the Wired network but suddenly she starts using the network, believing she would receive more messages even though everyone thought it was just a prank. Not long later, she...