Chapter 0: Izuku and Izumi

Neglected Izuku Yagi AU

Izuku Yagi, brother of Izumi Yagi, son of Toshinori Yagi (All Might) and Inko Midoriya (Mindwave).

Izumi had a stronger version of her mother's quirk while Izuku was quirk less and was then neglected for most of his life.

He soon decided that he had had enough and started a new life, with a family of spider demons.

This has partial ideas from other fanfics that I have read. The only part of Demon Slayer that is in this fanfic is the spider demon family from the Mount Natagumo.