Kimetsu no Yaiba

Since ancient times, rumors have abounded of man-eating demons lurking in the woods. Because of this, the local townsfolk never venture outside at night. Legend has it that a demon slayer also roams the night, hunting down these bloodthirsty demons. For young Tanjirou, these rumors will soon to become his harsh reality...

Ever since the death of his father, Tanjirou has taken it upon himself to support his family. Although their lives may be hardened by tragedy, they've found happiness. But that ephemeral warmth is shattered one day when Tanjirou finds his family slaughtered and the lone survivor, his sister Nezuko, turned into a demon. To his surprise, however, Nezuko still shows signs of human emotion and thought...

Thus begins Tanjirou's quest to fight demons and turn his sister human again.

(Source: VIZ Media)

Volume 7 contains a bonus chapter about Kanao Tsuyuri.
Volume 10 contains a bonus chapter about Inosuke Hashibira.

Kagarigari

"There is a human-hunting case which has thrown a town into confusion. The culprit is a vampire...A boy wielding a sword appears in front of the violent vampire?!" - official synopsis (translated)

Kagarigari is one of the 70th Shonen Jump Newcomer Treasure Award-winning​ entries and is the prototype to Kimetsu no Yaiba.

(Souce: Anilist)

Kagarigari Franchise