Ch.1 [Preserving a Legend]

Altair Otsutsuki Landed Himself in the World Of Demon Slayers, Especially He met the Famous Yoriichi Tsugikuni.

Continuing from One Of My Stories: 'Reincarnated into the World Of Naruto with the gamer system' Go check that out first before reading the Adventure of this Overpowered OC.

Also I don't Own Demon Slayer Or Naruto.