Nobody knows where they came from. They parasitize in human beings, take control of them and change their bodies into hideous monsters (Necro-borg). The Necro-borg fight each other until the other dies. Where did they come from? To what end? Yuji and Kaoru, whom both have dark secrets within themselves, get caught up in the horrific battles of Necro-borg. What will their fate be?

A 2nd-year high school student named Shun Takahata lives an ordinary teenage life until one day he's suddenly forced to participate in a series of children's games such as "Daruma-san ga Koronda" with death as the penalty for losing. With no knowledge of who's behind the games, he's left with no other choice but to keep winning as his only means of protecting himself and his childhood friend, Ichika. Meanwhile, a troubled classmate named Takeru seems to actually be relishing the opportunity to get other students killed. Written by Subrat Jain