Wolf, born into a deaf family, embraces sign language with confidence despite obstacles in life; Sophie, having received a cochlear implant at a young age, continuously strives to be seen as "normal" despite having a "deaf accent." Alan, with a cochlear implant like Sophie, is capable of both spoken language and sign language; he advocates for diverse modes of communication within the deaf community. Bound by love and friendship, the three embark on a self-discovering journey that is not without its moments of pain.

Gudo is a Soul Keeper, a spirit who guides human souls into their next life. When he befriends a young girl named Yuri, he discovers that her untimely death has left her cursed with unresolved rage and regret. As Yuri’s soul teeters on the edge of annihilation, Gudo embarks on a dangerous journey to stop her from unleashing horrible destruction on both the human world and the spirit realm.