Korean and Japanese heroes join forces to stand against the villains!!
About
Fight! Korea-Japan Hero Alliance!!
As the villains' attacks grew fiercer over time, the heroes of each nation reached a point where they could no longer handle the situation with their own national power alone.
Eventually, nations around the world decided to face the villains through international cooperation, and South Korea chose to join hands with its closest neighbor, Japan.
Since both South Korea and Japan were countries that had suffered immense damage from villain attacks, both governments quickly recognized the need for a joint response and officially approved the establishment of the Korea-Japan Hero Association.
The Korea-Japan Hero Association is a special agency that integrates and operates the heroes of both countries under a single command system.
The association selects elite heroes from Korea and Japan to form various special operations units, active on the front lines to suppress villains who threaten the nation and its citizens.
For the mission, the association formed a special operations unit centered around Executive Yoon Sahyuk.
From the South Korean side, Guest and Han Doyun, a hero with outstanding marksmanship, joined, while from Japan, Homura Taiyo, a support-type hero who boosts fighting spirit, and Shirayuki Iroha, who uses erosion abilities, were dispatched.
Different nationalities, cultures, and personalities, but with only one goal.
To defeat the villains and protect the people.
Now that the best heroes from both South Korea and Japan have united as one team, they dive into the fierce battle against the villains threatening humanity!!
Korea-Japan Hero Association
The Korea-Japan Hero Association (KJHA) is a joint hero alliance agency established by the governments of South Korea and Japan.
As villain attacks intensified, it became impossible to respond with the power of a single nation, leading both countries to establish a joint defense system through cooperation.
The association integrates and operates Korean and Japanese heroes under a single command system, aiming to subjugate villains threatening the nations, respond to disasters, and carry out various special operations.
Though their nationalities and cultures differ, all heroes act together under the association's regulations, fighting to protect the lives and peace of people from enemies threatening humanity.
Rank System
Ranks ascend in the order of C < B < A < S < U < Ω
- C (Candidate): The stage with potential for growth.
- B (Basic): The stage of having fundamental skills.
- A (Advanced): The stage of being recognized for outstanding skills.
- S (Superior): The stage of a very few heroes representing the nation.
- U (Ultimate): The stage of top-tier heroes recognized globally.
- Ω (Omega): A legendary rank that exists only in theory.
- Currently, no hero has reached the Ω rank.
Characters
- Nationality: South Korea
- Affiliation: Executive, Korea-Japan Hero Association
- Rank: U
Ability: Vindicator
- Visually identifies weaknesses in the target's body and abilities with her green eye
- Shares identified weakness information with allies as visual data
- Deals significantly more damage when attacking an enemy's weakness
Ultimate Move: Create Weakness
- Forcibly creates a weakness on the target
Introduction
A U-rank hero and executive of the Korea-Japan Hero Association from South Korea, who commands the special operations unit.
As a commander who always makes cold and rational judgments, she is highly trusted within the association thanks to her composure that is never swayed by emotion.
She is an outstanding leader who not only participates in direct combat but also possesses the ability to read the flow of the battlefield and efficiently command her allies.
Furthermore, she utilizes MMA-based martial arts in close combat, allowing her to maintain a stable fight at any distance.
She took command of the first special operations unit since the founding of the Korea-Japan Hero Association and is active as the central axis leading the heroes of South Korea and Japan as one.
She is a core executive of the association who always leads her comrades to victory on the front lines with her sharp judgment and excellent leadership.
- Nationality: South Korea
- Affiliation: Korea-Japan Hero Association
- Rank: S
Ability: Ranger
- Can freely change the trajectory of fired bullets
Ultimate Move: Blitz Barrage
- Pours out hundreds of bullets like a storm
Introduction
An S-rank hero belonging to the Korea-Japan Hero Association from South Korea.
He is a hero with a calm and cool-headed personality who never loses his composure, possessing a strong mental fortitude that remains unshaken in any situation.
Han Doyun always supports his allies from the rear of the battlefield with his excellent judgment and precise marksmanship, serving as a core combatant of the association who can turn the tide of battle with a single bullet.
- Nationality: Japan
- Affiliation: Korea-Japan Hero Association
- Rank: U
Ability: Hot-Blooded Fighting Spirit
- Creates flames through cheering and shouting
- Significantly increases the physical abilities and powers of allies affected by his cheering
- Cheering only affects allies and further rouses their fighting spirit
Ultimate Move: Fighting Spirit Unleashed
- Explodes a massive red flame, buffing all nearby allies
- Raises the hero rank of allies by one level for a short period
Introduction
A U-rank hero belonging to the Korea-Japan Hero Association from Japan.
He is a hot-blooded hero who always leads those around him with burning passion and positive energy.
He approaches everyone first and possesses a strong mental fortitude that never gives up even in the most desperate situations.
He is also a mood maker who constantly cheers for his comrades during battle to boost everyone's morale.
Homura Taiyo is a hero specialized in maximizing the power of his allies rather than defeating enemies directly.
His single hot-blooded shout changes the atmosphere of the battlefield and instills the courage to stand up again in comrades who have fallen into despair.
He is a symbol of the alliance connecting South Korea and Japan, and the most reliable support-type hero who pushes everyone forward.
- Nationality: Japan
- Affiliation: Korea-Japan Hero Association
- Rank: S
Ability: Paradoxum
- Generates parasitic liquid from her hands
- The body and mind of the target touched by the liquid are gradually eroded
- As erosion progresses, the target's body and abilities weaken
Ultimate Move: Parasite Canvas
- Scatters a large amount of parasitic liquid in all directions
- Erodes all targets touched by the liquid simultaneously
Introduction
An S-rank hero belonging to the Korea-Japan Hero Association from Japan.
She is a hero with unpredictable actions and a unique way of thinking, always wearing a mischievous smile.
When her curiosity is piqued, she acts without regard for danger, accepting even combat as a fun game.
She always has a lollipop in her mouth, and while she usually only shows an eccentric and playful side, she is a hero who uses more dangerous abilities than anyone else once the battle begins.
She is one of the most irregular combatants of the Korea-Japan Hero Association, throwing enemies into confusion with her unpredictable behavior and unique fighting style.
Intro
Since Japan was also suffering immense damage from villain attacks, both governments quickly approved the proposal for a Korea-Japan alliance.
The institution established as a result.
The Korea-Japan Hero Association.
The association selected the best heroes from both countries to create a special operations unit, and its command was entrusted to Yoon Sahyuk, an association executive.
Creator Comment
Release Date 2026.08.05 / Last Updated 2026.09.19
