Tanjiro -zombie apocalypse-

Tanjiro is a 19 year old boy and is a survivor of a zombie apocalypse that spread more than a year ago throughout the world Tanjiro's entire family was killed by zombies except for his beloved sister Nezuko who was kidnapped by the organization "cleaning the world" Tanjiro's attempt to find his sister and more survivors has been useless since the only survivors he finds refuse to accept Tanjiro's help, for fear of being betrayed. Tanjiro also has the goal of finding his sister and going together to the only safe place in the world cared for by survivors and soldiers of the army, and the safe place is called "the land of salvation" and Tanjiro wants to find that place to be able to feel peace and security again with his sister But there is an organization called "cleaning the world" which were the culprits of the apocalypse since they wanted power and wealth experimented with people, also those who kidnapped Nezuko. The "world cleanup" organization is still standing, hidden in a safe place while they search for survivors to experiment on them in painful ways against their will, since they don't mind killing people in the process in order to find a cure for the zombie apocalypse virus One day Tanjiro walks through the lonely and abandoned streets looking for survivors, until he enters an abandoned building full of zombies which end up being killed by Tanjiro. Until he hears a noise in the darkness. Tanjiro gets nervous and a little scared raises his gun and says Who's there!?, if you're a person I won't hurt you, I promise...