Giyuu Tomioka is just tired. Tired of being bullied by the Hashira, tired of seeing dead family and friends in people, tired of living. Just tired. Drowning in sorrow and dispair, he meets a boy named Tanjiro Kamado, who has an extremely stong sense of smell. He is able to sense the loneliness and depression, and along with his sister Nezuko, he vows to help Giyuu through it. The only question is: can you truly save someone who doesn't believe they should be saved?