01
Extracurricular club activities are the norm for Japanese schools, but an all-night movie event scheduled at school and in August still sounds strange/unusual, especially considering the tiny size of the Movie Research Club (merely six students). And indeed, the two teachers supporting this novelty have hidden motives/objectives, although also the six students themselves chose to participate in the event for personal/secret reasons...
02
Kansen 2 (like the first episode) takes place during the initial outbreak of the Unknown virus epidemic, but the protagonists here have a much harder lot because they are stuck in the middle of a contaminated city immediately after its destruction by a mysterious cataclysm.
Stalked by hordes of infected maniacs, Hiroshi Ookura and his friends seek safety inside a mostly intact shopping mall, but madness and death are everywhere...
03
Four years have passed since the terrible events narrated in Kansen 1 and 2, and the terrifying plague which depopulated the Tohoku region of Japan has been reduced to a mere (bad) memory, thanks to drastic quarantine measures coupled with an effective vaccine.
But the Unknown virus is not dead yet and soon, very soon, an unescapable doom will fall upon Wataru Ayase and his family and friends, trapping them inside the "Hell on Earth" madhouse which originally was their home city, Tokyo...
04
Most events in Kansen 4 take place "The Day After" the endings of Kansen 1 and 2, during the reclamation of the contaminated areas by the Japan Self-Defence Forces.
Daisuke Sendou just enjoys his school life with his classmates. One day, they go camping just before summer holiday (therefore escaping the initial outbreak of the Unknown virus epidemic), but... A cruel result is awaiting them there...
05
Four years ago, Makoto Nakazawa lost family, friends, and even memory of the events during the outbreak of the Unknown virus epidemic in the Tohoku region of Japan.
Now adopted by a female friend of his defunct father, he lives in the Shibuya district of Tokyo, struggling to rebuild a new life in a new land. However he doesn't suspect what Fate has for him when he accepts to go to a little (and not entirely fictional) island in the Inland Sea of Japan as correspondent for the newspaper club of his school, because that island is about to become one of the starting points of the second outbreak of the epidemic he barely survived once...
