"Death Note: eternal evil" , a Death Note fanfic series

Takao Ryuudai, a 37 year old virgin and recluse, has been a Death Note fanatic since he was 17, just a year after his parents were murdered.
The Death Notes he bought as collectibles lie on his desk till today, filled with so many names of criminals worldwide that there is almost no space left.
True justice has not been cast upon those criminals, until the night when Takao's notebooks are granted supernatural powers by the god of death, Zem.
How will the bored-to-death shinigami (god of death) and sick-of-life hikikomori (antisocial person) collaborate to eradicate evil... and boredom?