Death Note

Length: 37 episodes
Genre: Psychological / Drama / Detective

Plot: Light Yagami is a genius high school student who one day picks up a Death Note. He discovers its power to kill humans and constructs a crazy elaborate plan to rule to world and eliminate corruption through strategic murders.

It gets pretty intense and complex. The number of crazy plot twists in this story will keep you on your toes. This story looks into institutional corruption. But the most interesting part is how Light keeps coming up with such intricate plans that somehow work every time.