Demon Slayer: Kimetsu no Yaiba

Kimetsu no Yaiba (鬼滅の刃, Kimetsu no Yaiba) is a manga written and illustrated by Gotouge Koyoharu.

Plot
Tanjiro is the eldest son in a family that has lost its father. Tanjiro visits another town one day to sell charcoal, but ends up staying the night at someone else's house instead of going home because of a rumor about a demon that stalks a nearby mountain at night. When he goes home the next day, tragedy is waiting for him.