I don't know I've I want this to be izuku yagi book or a neglected male reader book I'll but two story ideas for this idea
Izuku yagi the son of all might and Inko and the brother of Izumi yagi but it all changed when he was known as quirkless he was neglected by his parents and bullied by his sister and her friends that were ochaco,lida,katsumi,shoka,jirou,Momo but one day exploring he found a weird dark purple phone
izuku picked it up felt the amounts power from and saw flash backs of knight in purple armor with a horse the images show the armor,the sword,the shield
And the the horse
And the spell seal
Izuku practice his dark magic to become a vigilante
Name himself the wolf knight(Harem or one girl or single 👆)
I don't know what anime or crossover you readers want this to be for the male reader idea
Union book
Rwby
Fairy tail
High school dxd
Maken ki
My hero academia
Yn ln life wasn't so well parents ignored him for his brother and sister he gets bullied by the other students a school he wish and prayed that something new happened in his life he felt something hit his head and saw a weird phone
Yn felt the urge of power going in him and saw flashes of a red armor with a sword and shield and horse
Till that day Yn changed to become better than his family and bullies and also save people that are in need naming himself the red wolf warrior