It is the Taisho Period in Japan. Tanjiro, a kindhearted boy who sells charcoal for a living, finds his family slaughtered by a demon. To make matters worse, his younger sister Nezuko, the sole survivor, has been transformed into a demon herself. Though devastated by this grim reality, Tanjiro resolves to become a “demon slayer” so that he can turn his sister back into a human, and kill the demon that massacred his family.
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Yuki Itose is just a typical student dealing with the pressures of college. She is struggling one day on the train when an upperclassman named Itsuomi Nagi helps her out. As he gradually opens a new world to her, Yuki develops feelings for Itsuomi. A pure love story begins to grow.
(Source: Crunchyroll)