After a biological terrorist attack kills off the population of a Russian town; Japan's Public Safety Special Third unit, code name THIRD-i, believes that the terrorist organization responsible plans to unleash the same virus known as Bloody X into Tokyo. Subsequently, THIRD-i recruits the help of genius hacker Takagi Fujimaru to find out what happened in the Russia. However, as Fujimaru becomes involved, he soon finds out that he is in over his head and that the terrorist groups influence reaches not only his school but even the police. Fujimaru must now rely on his skill as a hacker to unravel the organizations sinister plot and find out the truth behind "Bloody Monday."

Currently Airing | Year: 2008

More info here: Bloody Monday - DramaWiki

You can watch it stream here with english subbed

Bloody Monday Japanese Drama | Watch Episodes | Reviews | Images

My thought:

One of recommendation of Japanese series, really like this one. One of my favorite out there.
There can be some unpredictable so might be some crazy twists

I guess I shared out this series if someone is interesting