Dakari No Katana (堕狩の刀) Blade Of Fallen Slayers

Fourteen-year-old Masaru Tsukinohana was fetching water from the river when he returned home to find his family murdered, his mother hanging from the ceiling. Devastation and pain consumed him day by day. Instead of burying his deceased family, he lay motionless, sobbing. It was then that a kind-hearted man in a warm white kimono took him in and offered him hope to survive. He trained Masaru to become a Slayer, tasked with annihilating ghouls, ghosts, spirits, demons, and vampires lurking in the world at night.