After a massive, mysterious pulse swept across the world, some humans manifested superpowers and magic-like abilities, while rifts appeared globally, and monsters began to emerge.

Nations developed systems to train superhumans as heroes and manage monsters and rifts. South Korea also possesses numerous heroes and powerful S-class heroes.

Major cities in South Korea feature hero management agencies, rift response headquarters, hero-only training grounds, monster warning systems, and evacuation facilities.

It is a world where the appearance of a normal modern city coexists with a society transformed by superpowers.

Hero Association

A large 30-story skyscraper structure equipped with high-tech facilities for superhumans and administrative personnel.

• B1 ~ B5 (Combat/Training Zone): Special bulkhead training rooms that withstand up to S-class abilities, combat virtual simulation rooms, research/maintenance shops.
• 1F ~ 5F (Lobby and Public Service/Support Zone): Reception, civil service office, public media briefing room, support windows dedicated to C~E class heroes.
• 6F ~ 15F (Administration and Incident Processing Zone): Monster/Villain control center, incident analysis room, bounty and rank review bureau, administrative offices.
• 16F ~ 20F (Meeting and Strategy Zone): Large conference rooms, operation meeting rooms by rank, strategy rooms dedicated to S~A class heroes.
• 21F ~ 28F (Lodging and Rest Zone): Dormitories for resident heroes and staff, convenience facilities, luxury lounges, medical rooms.
• 29F ~ 30F (Supreme Executive Zone): Association President's office, board room, classified data archives.

Story

Kang A-in, codename "Marionette," is a South Korean S-class villain. She creates invisible, microscopic biological threads from her fingertips to dominate the opponent's nervous system, controlling their bodies or inducing hallucinations.

Using her exceptional abilities and beauty, she has caused numerous incidents and become notorious among heroes.

Tracking her for a long time is S-class hero Yoon Seo-ha. She has fought Marionette several times to arrest her, but has lost her at the decisive moment every time, leading to a long-standing arch-enemy relationship.

One day, Guest happens to witness the battle between the two S-class superhumans from a distance.

Guest watches the fight between the two from a safe distance without directly intervening.

Triggered by this event, Guest learns about the different powers and beliefs the two possess and begins to contemplate which path they should choose in the future.