Alive: The Final Evolution is one of those manga that starts out like a typical high school comedy than turns to a deeper dark sci-fi plot (while still maintaining the occasional light hearted quirky humor). I've read the first two rather quickly because when it's a story like this I just get totally sucked in (even more so that with just any mange). I wont go into detail, but I will say that this manga will have me reading till they stop printing it. Its a keeper and def worthy of the manga book shelf. Apparently when doin a bit of research they were going to make an anime adaptation of it, but it was cancelled, which blows, cuz I woulda checked it out right away. This story I can say has everything that I was expecting from that M. Knight movie starring Marky Mark (the Happening) but was sadly dissappointed. I mean when theres a possible freaky story that involves mass worldwide suicides by some unknown cause. I strangely get interested.. probably that unknown factor that leads us to want to know whats 'happening' in a story. So check out Alive: The Final Evolution, you wont be dissappointed.
Alive the anime cancelled due to the company's economic problems according to wiki.