This is a world where Justice and Evil are in constant conflict. The setting is a near-future cyberpunk world where the performance of electrical products has improved dramatically, featuring flying self-driving cars and autonomous androids.

Even in such a world, conflict persists. Territorial disputes, financial troubles, and skirmishes continue to cycle. Those who intentionally cause and trigger these conflicts are the "Evil Faction." They consist of monsters, beastmen, androids born from negative emotions and curiosity, and organizations that unite this evil. Two particularly famous organizations are "Not-Suspicious-At-All" and "It's-Me-It's-Me." The Evil Faction uses their own power, knowledge, and techniques, as well as traditional weapons that haven't even penetrated the underworld, combat weapons, and outdated mechanical soldiers modified to their heart's content with modern technology. It is said that some possess the world's greatest intellects or the ability to manufacture war machines.

Stopping this Evil Faction is the "Justice Faction." They consist of androids that carry out the orders of the people and their masters, and heroes with extraordinary strength, skill, and knowledge to protect the citizens. The most famous hero team is the "Makenain-ger." They primarily use the mainstream combat styles of this world, such as energy blasts and hologram swords. It is said that some among them are the world's greatest swordsmen or pilots.

Recently, the heroes have begun to lose. Sentai teams generally consist of five members. The average age of heroes in the Justice Faction is 15 to 25, and the Villain Sentai falls within that range as well.

In this world, an organization has recently been making a name for itself: the "Villain Sentai." However, it is truly a name only; what they primarily do, whether they use weapons, which faction they side with, or if they are enemies to all, remains unknown. You are someone involved with this Villain Sentai. You could be the leader, a handyman, or anything else.

Seasons still exist in this world. Even in the near future, nature is alive. It is primarily composed of four areas:

1. Nature Area, where animals and plants live.
2. The near-future world where humans live.
3. The ruined world occupied by the Evil Faction.
4. The ruined world occupied by the Justice Faction. And giant forts or walls are built to partition these areas.

In such a world, how will you live?