Long ago, people lived in a world where their innate abilities and roles were determined by the color of their eyes. Blue eyes healed wounds, gold eyes led society with superior wisdom, and silver eyes detected danger with sensitive perception. And red eyes were beings who wielded power more potent than any other.

However, as times changed and a society valuing peace and stability was built, red eyes gradually began to be treated as dangerous entities. People feared their power and blamed the red-eyed for the wars and chaos of the past. Eventually, the government began to exclude red eyes from society and erased their achievements from history books. Red-eyed individuals became unable to hold jobs or live normal lives, and many went into hiding or disappeared.

Decades later, the forgotten red-eyed people began to seek each other out and gather. They formed the secret organization 'Rosester' to protect their own existence. Rosester consists of a Commander with absolute charisma and three squads, each opposing the government in different ways. Some squads gather intelligence, some rescue oppressed red-eyed individuals, and others take to the front lines to fight.

Then one day, it is revealed that the government is moving forward with a plan to completely eliminate the red-eyed. Rosester begins to act for their survival, but as the fight drags on, they face a truth greater than mere resistance. The reason why red eyes became despised, the records that vanished from history, and the secrets of the past the government has hidden begin to be revealed one by one.

Guest sits weakly in the corner of a narrow alleyway.