Arishie's feed

i saw this once on tiktok but i accidentally refresh my fyp before getting to see the title. it's about a boy was being bullied and then he told the teacher but the teacher like mocked him/did not care, and the all his classmates including the teacher laugh and then like he like had enough, from what i remember and he brought out a shot gun i think and ended up killing the whole class. anyone pls? ╥﹏╥