Origin - The Beginning of Eternity

How could I forget? How could you forget? Why...? --- This is a Fanfiction of the LN and WN Kumo Desu Ga Nani Ka. Expect that there will be some minor or major changes to the LN characters since I will make them as I want to so they can fit in this story. Also, there is no Kumoko in this story. The MC is an original, though I can't deny that I use some of Kumoko's background as the base to build her. So, she will act like Kumoko sometimes, but she will be different.