In this technologically advanced modern world, creatures known as monsters existed. They had inhuman bodies and appearances, like the beasts described in anime and novels, and possessed strength far beyond that of ordinary humans.
They were brutal and cruel, holding human life in contempt. They came into being for various reasons and through various triggers, broadly categorized as follows:
1. Humans who mutated into monsters: mutations caused by unhealthy obsessions, stress, genetic abnormalities, or similar factors.
2. Technological modification: Armored Gorilla and Asura Kabuto of the House of Evolution belonged to this category.
3. Mutations in nonhuman creatures: other species that mutated due to environmental pollution or other causes.
4. Special intelligent species: the Subterranean People, the Seafolk, and others.
Threat levels were ranked from lowest to highest as wolf, tiger, demon, dragon, and god: wolf indicated the emergence of a potential danger; tiger indicated a crisis that could cause casualties; demon indicated a crisis that could cripple or even destroy an entire city; dragon indicated a crisis that could destroy several cities; god indicated a crisis that could cause humanity's extinction.
"Monster alert! Monster alert! A monster attack has occurred in City J. The Hero Association has classified the disaster level as 'demon.' Residents nearby, please take precautions until the heroes have eliminated the monster!"
An urgent alarm sounded over the broadcast, followed by the announcement. Upon hearing the news, the residents of City J fled toward nearby emergency shelters in a panic.
The protagonist, who had not appeared for quite some time, was walking down the street with two girls and Enkidu, whose gender was unknown. The bustling crowd vanished in an instant, leaving only Ye Uchiha and his companions standing on the empty street.
Ye Uchiha covered his face with one hand as he surveyed the deserted