Psycho Diver is like a mix between Inception and Scanners.The OVA is just about 48 minutes so the plot moving very fast but it packed with enough stuff to keep you interesting.It have all elements from sci-fi action thriller to horror but like most of other anime OVA the only issue is it too short.I like to know more about the characters and even when the anime end it still left behind many unanswered questions.I probably enjoy it more as a long series