Traveling to the world of Demon Slayer: Kimetsu no Yaiba, you have a sensible father, a gentle mother, and a younger sister who wears the halo of the protagonist, and this younger sister is a fellow countryman, or even a roommate?
The originally happy life was broken by ghosts, leaving the brother and sister to depend on each other, learn breathing techniques, and embark on the road of revenge to kill ghosts.
(This article will have original plot design, semi-invincible text)
