Strongest sorcerer of Nazarick

As Momonga looks over the guardians bowing to him, his gaze lingers on one in particular. The wandering guardian, secret boss of Nazarick. Created by the joint efforts of all guardians except Tabula Smagardina, the NPC was the undisputed strongest of Nazarick. With the name Ryoumen Sukuna and one of the rarest racial classes in the game "Fallen one" , just creating him had taken hours of work, not to mention the usage of one of 'the 20'. Even among the lvl 100 guardians, he alone was the honoured one. But unbeknownst to him, there was something wrong with his strongest guardian. That's right, he was a reincarnated nerd who had gained a few unique 'mannerisms' due to the flavour text of the NPC he had reincarnated into. Oh well, as long as he is loyal Nazarick, do a few bouts of mischief really matter? So read along, as our main protagonist is forced to cope with his new circumstances, as he slowly changes the story of overlord and the story of overlord changes him. Witness him turn from a man just trying to survive into "the strongest". __________________________________ DISCLAIMER: This story will be as dark as the original overlord, just a tad bit shorter and a tad more wish fulfillment. and do not expect the MC to betray Ainz and turn into the new ruler of Nazarick or something. he is an NPC and act like one, if you cant stomach that, then don't read. but this does not make him a pushover, he will question Ainz and try to go against his judgement more than every other NPC combined, provided it does not make every character in the story look like a poorly written jackass. A/N: Hello dear readers. This is my new novel and I plan on writing this fanfic until either I finish the elf kingdom arc, and if Maruyama finishes the novel, then I'll continue until I finish the story. I haven't played the game so no mass of the dead content. Any support will be appreciated.