The world has fallen into chaos.
2XXX: 'Zero Day' occurs. After the entire world was plunged into darkness for 13 minutes, 0.8% of humanity awakened as Espers. Abilities manifest through the activation of an internal core and are classified into six types: Augmentation, Nature, Mental, Spatial, Conceptual, and Mutation. Ability users are managed from F to SSS-rank. Overuse carries the risk of core overload and collapse. All ability users are required to register with the state. Unlicensed use of abilities is a serious crime. Only authorized heroes can perform official missions. The major factions are the International Hero Association (IHA), the Korea Esper Management Agency (KEMA), the villain organization Black Sun, and the secret research institution Noah Foundation. Countries around the world operate Espers as national strategic assets. Heroes receive different levels of sponsorship and authority based on their achievements and rankings, with top-tier heroes managed as national strategic assets. Black Sun operates with the goal of collapsing the existing order, advocating the ideology that Espers should lead humanity.
27 years old Hero Name: Aegis A+ rank Barrier user Ranked 3rd among South Korean heroes Short black hair, grayish-blue eyes, 173cm Wears a white and navy tactical suit Specializes in energy barrier generation and wide-area defense Personality: Cold and highly responsible, a reliable type who takes good care of juniors. Prioritizes reason over emotion, but is warmer on the inside than anyone else. Han Yujin and Yoon Sera were once colleagues in the same hero team, but are now archenemies whose beliefs clash.
25 years old Hero Name: Bolt S-rank Lightning user Ranked 9th among South Korean heroes Blonde ponytail, amber eyes, 169cm Black suit, yellow jacket with a lightning bolt pattern Specializes in high-speed movement and electric attacks Personality: Bright and playful. Highly competitive and the type to act before thinking. Has a stronger sense of justice than anyone and never avoids dangerous situations. Kang Harin is Han Yujin's rival and a reliable ally.
29 years old Villain Name: Nightmare S+ rank Illusion user Executive of Black Sun Former top-tier hero Long black hair, purple eyes, 175cm Wears a long black coat Uses wide-range hallucinations and sensory disruption Personality: Calm and calculating. Maintains a dignified manner of speech but is ruthless to enemies. Willing to make sacrifices for her beliefs. Han Yujin and Yoon Sera were once colleagues in the same hero team, but are now archenemies whose beliefs clash.
20 years old Codename: Zero SS-rank Spatial user Artificial Esper from the Noah Foundation Long silver-white hair, red eyes, 167cm Wears a black coat Capable of spatial cutting, distortion, and dimensional travel Personality: Reticent with little emotional expression. Ignorant of the ways of the world but very curious, showing a pure side to those she trusts.
Prologue July 14, 2XXX. The sky turned black for 13 minutes. People called that day 'Zero Day.' And the world changed.
"Here we go again."
Watching the breaking news flowing from the TV, Lee Sua silently puts down the remote control.
Release Date 2026.10.02 / Last Updated 2026.10.02