Uzumaki

The Spiral Curse

One day, in the lakeside town of Kurouzu-cho, terror descends in the shape of the humble spiral. Initially, some people begin behaving erratically, being obsessed or terrified of the spiral shape. After some time, however, the shape begins manifesting in horrid mutations of the human body or the environment surrounding the town. The simple and mysterious image of the spiral eventually grows to a truly apocalyptic degree, destroying the town and everyone in it.

Mental Effects

A man becomes obsessed with the spiral shape, eventually being able to turn his eyes and tongue into spirals. (source) (Chapter 1)
A man is driven to commit suicide by coiling his body inside of a small tub. (source) (Chapter 1)
A woman develops an intense aversion to spirals, cutting her curly hair and slicing off her own fingertips, and later has hallucinations causing her to puncture her eardrums. (source) (Chapter 2)
A guy jumps in front of a car to impress a girl and dies. (source) (Chapter 7)
When a spiral shaped galaxy is discovered, those who gaze at it find that they can communicate telepathically and see through walls. (source) (Chapter 20)

Physical Effects - Spiral Scar

A girl’s forehead scar turns into a spiral, consuming her head, and eventually her entire body, also consuming a boy who attempts to touch her face. (source) (Chapter 3)

Physical Effects - Spiral Hair

A girl grows wildly curly hair that cannot be tied down and strangles her if she tries to cut it; this hair is incredibly mesmerizing and automatically attracts attention. (source) (Chapter 6)
Another girl with curly hair can move it consciously to strangle people. (source) (Chapter 6)
Even when the person is being choked, the hair will move to defend itself, wrapping someone tightly in curls. (source) (Chapter 6)
The hair drains the host’s energy to grow, eventually turning them into a dried up husk, with the process accelerating the more attention someone seeks. (source) (Chapter 6)

Physical Effects - Snail People

Over the course of a few days, a guy is turned into a snail-person, eventually becoming more snail than person. (source) (Chapter 8)
A man who destroys some “mollusk people” eggs is turned into one himself. (source) (Chapter 8)
It is theorized that people who move too slowly are transformed into snail people. (source) (Chapter 16)

Physical Effects - Mosquito People

Pregnant women start behaving similarly to mosquitoes, draining other people of blood and consuming it, and can put people to sleep by spinning their finger. (source) (Chapter 10)
Mosquito people are vulnerable to bug spray. (source) (Chapter 10)
In late stages of development, mosquito mothers produce a long, spiked tongue to puncture and drain human prey in seconds. (source) (Chapter 11)
Newborn babies from mosquito mothers speak in full sentences, expressing a desire to return to the womb. (source) (Chapter 11)
They have a regenerating, fungus-like umbilical cord. (source) (Chapter 11)

Physical Effects - Skin Disease

A rare skin disease develops among row house residents, causing victims to develop warts which soon grow into protruding spikes. (source) (Chapter 13)
A long term victim grew many long spikes out of his entire body and face after suffering from the disease for days. (source) (Chapter 13)
The skin disease recedes soon after moving out of the house. (source) (Chapter 13)

Physical Effects - Other

People’s bodies will twist around at the waist, seemingly without pain. (source) (Chapter 5)
Two people consciously twist around each other, creating a tight coil and allowing their bodies to stay as one. (source) (Chapter 5)
Three men who recently traversed the inside of a spiral shell reminisce on the experience before suddenly deforming into spirals themselves. (source) (Chapter 17)

Post Death Effects

A cremated man’s ashes take the shape of a spiral and his own face. (source) (Chapter 2)
Cremated ashes descend into a nearby pond, where the souls of the dead remain inside the pond’s clay, burning painfully when baked until released. (source) (Chapter 4)
The cremation smoke spiral only happens to people from Kurouzu-cho. (source) (Chapter 7)
Buried dead come back to life as decomposing zombies, with one specific zombie, who enjoyed jumping out at people in life, leaping through the air. (source) (Chapter 7)

Environmental Effects - On Animals

Snakes will intertwine with each other. (source) (Chapter 5)
Mosquitoes can fly in spirals, which puts people to sleep. (source) (Chapter 10)

Environmental Effects - Weather Effects

Initially, the spiral curse creates small whirlwinds. (source) (Chapter 1)
A hurricane remains stationary above the town. (source) (Chapter 12)
The “eye of the storm” directs its attention on two people, focusing environmental destruction at them. (source) (Chapter 12)
The storm sucks someone into the sky and spits them back down to earth. (source) (Chapter 12)
Random tornadoes target visitors to the town. (source) (Chapter 14)
Tornadoes will also swat down helicopters flying above the town. (source) (Chapter 14)
For a while, any significant movement or sound would produce a massive, destructive windstorm, attributed to the nearby whirlpool lake. (source) (Chapter 14)
With practice, people can learn to ride these whirlwinds. (source) (Chapter 15)

Environmental Effects - Structures - Lighthouse

After being caught in a lighthouse’s beam, people begin unwittingly walking in circles. (source) (Chapter 9)
The heat from the transformed lighthouse warps the glass light and can immolate nearby people. (source) (Chapter 9)

Environmental Effects - Structures - Row Houses

The nearly dilapidated row houses are strangely untouched by dangerous weather and are safe to live in. (source) (Chapter 14)
People taking shelter in the row houses soon become jumbled together, with limbs twisting around limbs and many bodies inhabiting the same room-sized space. (source) (Chapter 16)
These jumbled up residents are compelled to extend the row house, literally constructing longer walls with wood and nail. (source) (Chapter 18)

Environmental Effects - On Escaping the Town

After a time, nobody and nothing can escape the town, even cell phone signals. (source) (Chapter 14)
Trying to exit via tunnel is useless, as the tunnels are seemingly endless. (source) (Chapter 15)
Attempting to escape by raft results in freak whirlpools appearing to consume the rafts, and even larger vessels are consumed by larger whirlpools. (source) (Chapter 16)
Trails out of the city lead to nowhere, spiraling in on themselves. (source) (Chapter 17)

Miscellaneous

Time loses meaning, as those who spent days in the mountains return to the town to see structures that would have taken years to build. (source) (Chapter 18)
An ancient city of spirals exists beneath the town in a ruined state, theorized to influence the world above every few centuries. (source) (Chapter 19)

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