Everyone is searching for a reason.1949, Post-war Tokyo-As the Japanese become more of a minority in their own homeland, they continue to place their hope for the future in Primavera's hands. Alan and Keith have returned from war to find Tokyo very different from the one of their memories. Both may be maintaining high spirits, but they struggle to find their reason to keep fighting for a better future without being held back by bitterness. Will Primavera hold the answer for Alan and Keith, as well as the Japanese people?

University student Shinji, who felt trapped in life because he couldn't make progress romantically or with finding a job, was given a chance to reincarnate. Moreover, he was given a "fated partner" to be with. He wondered if a happy life would begin, but then it began -- an eternal death game where he must kill constantly, only ending when he finally is killed him self.

"Don't worry, Big Sis will kill you."

Joining the murder spree with "Sister" Hilde, who shows an unusual affection towards him... The death game begins with a bond forged in blood!