Death the kid

Shibusen, standing for Death Weapon Meister Academy (DWMA) the technical school for Reaper Armsmasters that operates from the deepest recesses of all the corners of the world, in order to prevent the second coming of the so-called Demon God who is feared upon bringing destruction of all humankind and envelop the world with nothing but madness and darkness. The reaper built this agency for weapons and for those who will be trained to wield them.

In a world where being born with superpowers called a “Quirk” is the norm, a quirkless regular middle schooler Izuku Midoriya dreams to join the band of heroes that he grew to admire and love, and save the world. Despite being constantly bullied by his schoolmates for having no quirks, he does not give up on his dream and turns his attention into meticulous data gathering about the heroes instead.

Kurosaki Ichigo is not your average, everyday 15-year-old high school student. He has from as far he can remember always had the ability to see ghosts and spirits.

Basically everyone in the Soul Society lose their memories of Rukia & Ichigo

In a world where having superpowers is the norm, heroes fight day and night against the villains who terrorize the populace in order to keep peace and order in the society. The story follows a seemingly bland but extremely powerful individual named Saitama, who initially fights as a hero for fun.

Soul Eater is a Japanese manga written and illustrated by Atsushi Okubo. Set at the "Death Weapon Meister Academy," the series revolves around three teams consisting of a weapon meister and (at least one) human weapon.