With No Presence at All, I Begin to Save the World

Human presence is determined by one's “observation value.” When someone's presence falls below a critical threshold, the “Transparency Phenomenon” is triggered: even after death, their body is automatically erased from the world, and all memories of them vanish from other people's minds, as if they had never existed. To address this, the government established the “Ghost Countermeasures Division,” which handles deaths that cannot be recorded. The protagonist, Toru Suzumiya, has a naturally near-zero presence, making him the only “observer” able to see these “forgotten dead.”

Seventeen-year-old Toru has been treated like “thin air” since childhood. Even his parents forget to make him meals. One day, he sees his classmate Chihane Shio fall from a building, only to find her body disappear the moment it hits the ground. No one in the class remembers she ever existed. Just as Toru begins to think he's losing his mind, Shio appears as a ghost and declares, “Only you can save me from dying 300 times in a reincarnation loop.”

It turns out that Shio has a crush on Toru, which keeps triggering the “observer's paradox.” Every time she tries to get his attention, abnormal fluctuations in her presence cause her to die. But after each death, time rewinds and resets, and only Toru retains his memories. The two form an alliance and use Toru's absolute invisibility to infiltrate the Ghost Countermeasures Division database. There they discover a hidden rule of the world: the 100 people with the lowest presence rankings become “scapegoats,” and their accidental deaths offset disasters that would otherwise befall other humans.