The Unknown One's Reincarnation and The Unremembered System TUOR

Waking up in what seems like absolute nothingness,our Protagonist's memories are just like the nothingness outside. He can't seem to remember his name,age or where he comes from.
After being found in the nothingness by a strange entity which sends him someplace else,he finds himself in a forest,all alone...along with a System in his head! Thankfully,with a System,he will be able to remember who he is...problem being,the System also can't remember anything at all!
Watch as the protagonist sets out on his journey to find out who he is along with his not-so-trustworthy System and another companion in his head that joins later on.
But is finding out his identity worth the risk? What hidden and untold dangers lurk behind the secret of his identity,stopping him in his path to remembrance? And just what exactly lies ahead of him at the end of his goal?

(I don't own the cover of the novel.)