A terrible war has ravaged the land, and now, fueled by the blood of numerous fallen warriors the Yoma, demons from hell, emerge once more. A skilled ninja seeks to end the bloodshed these demons inflict upon humanity, but to do this he must fight against his undead former best friend and fellow ninja who was killed in battle and has been resurrected to serve the Yoma. (Source: ANN)

Half a century after a devastating war that brought Japan on the brink of destruction, a centralized network named Sound Health Everlasting Long Life (SHELL) has become the basis of the new society. Thanks to cutting-edge research on nanomachines and medical treatment, people are guaranteed a life free of diseases, but they are expected to work 19 hours a day in return. Moreover, when someone disconnects from the SHELL system, an extremely rare phenomenon called Human Lost takes place, transforming humans into monsters—Lost—that need to be destroyed, lest society will collapse for good. However, in this society where the fear of pain and death is absent, antisocial behavior is on the rise. Factory worker Takeichi plans to besiege the Ministry of Interior to protest against his inhumane living conditions and manages to convince his friend, the unknown painter Youzou Ooba, to join his cause. But when their suicide operation inevitably fails, Takeichi is left with a body beyond repair and mutates into a Lost, with Youzou immediately following suit. In the ensuing fight, a member of the dispatch team, Yoshiko Hiiragi, uses her ability to detect the Lost and discovers that Youzou has the unique capacity to return to human form. As the third person who survived after becoming a Lost unit, Youzou soon joins Yoshiko in investigating the recent outburst of Human Lost phenomena that threaten the last chances civilization has to be reborn.

Nagisa is a schoolgirl with schoolgirl tendencies, waking up late, rushing off to school and meeting up with friends upon the way. One morning Nagisa comes across a woman dressed in a strange uniform who seems to stare at her, unnerving Nagisa. Later that day, whilst staring out the window, Nagisa becomes aware of a ball bouncing by itself which flings itself towards her window seat, shattering the glass yet not harming her... Turning back to the front she finds a gaping mouth bristling with teeth inches from her face and no-one else about. She screams and the world returns to normal with her standing and the centre of curiosity of her class... why did she scream?

Kayoko is a young girl in 1940, just starting first grade. She's a bit of a crybaby, which is no secret to those around her. She loves playing with friends and singing cute schoolyard chants, and occasionally having fun with her three older brothers. Her mother is pregnant, and so she looks forward to being a big sister, only partially understanding the responsibility that might bring. Meanwhile, the war effort is growing, and it`s only the natural thing to do to be patriotic and support the country... Kayoko goes so far as to contribute her favorite dolly, whose materials could help build explosives. Time passes, and as she grows older, Kayoko sees how the war has affected her life and those around her. Nothing can prepare her for 1945, however, and the bleak times that are soon to come. Based on original creator Kayoko Ebina's real life experience during World War 2 on Showa era. (Source: ANN)