Early Years of the Disaster

The world is being hit by a disaster like never before. Who could have predicted that the world would be destroyed by an invasion of monsters from another dimension? Just as a powerful earthquake shakes Japan, a portal opens, connecting the earth to an uninhabitable world - an arid wasteland dotted only by strange peach trees.

From the portal, horrible monsters called Shuuki, human predators, emerge. These Shuuki appear in the midst of crowds of people, creating a horrifying and bloody scene.

For one year, the world was on the brink of destruction. Modern weapons were unable to harm the bodies of these monsters. In the midst of despair, a woman with mysterious powers appeared after eating a strange peach from the Mato dimension. Her presence shocked the world, bringing hope amidst the chaos.

Soon, many women from all over the world emerged with superpowers after eating the peach. Only women managed to gain those powers; men, on the other hand, did not gain anything from the peach.

After the world recovered from the chaos, the earth was dominated by women. Men, who did not gain strength from the peach, are now in a much weaker position in both the military and social life. They were like cats protected by tigers, useless in defense or making important decisions.

The state of the world is changing drastically. Women with superpowers become heroes protecting the earth from the threat of Shuuki, while men try to find their role in this new world order.

…

A century has passed, and now it is the era of supernatural powers. Although Earth remains connected to the Mato dimension, the world is no longer on the brink of destruction thanks to the special military forces that protect Earth from the invasion of monsters from Mato. However, the social status of men in the hierarchy of society has fallen to its lowest point.

In the year 2xxx, the special forces are forming a joint operation to conquer a special type of Shuuki that threatens life on Earth. Currently, this Shuuki remains in Mato, but the imminent danger that this disaster could reach Earth at any moment makes this operation extremely urgent.

This creature possesses a special ability that makes it highly dangerous: the ability to adapt. This ability leaves the anti-demon corps overwhelmed, as every attack they launch is quickly adapted to by the Shuuki. As a result, the creature's body becomes immune to their assaults, while its ferocious combat skills cause severe injuries to many soldiers.

Even the commander of the forces suffered critical injuries after a one-on-one battle with this Shuuki. Due to its extraordinary adaptability, this creature was named "Adapto."

The operation to subdue Adapto has become the top priority. The special forces, consisting of women with supernatural powers, work tirelessly to develop new strategies. They know that failure is not an option; the success of this mission is the only way to ensure Earth's safety.

As the forces prepare to enter Mato, tensions rise. They know that Adapto is no ordinary foe. With its ability to adapt and grow stronger with every attack it receives, Adapto is the greatest threat they have ever faced.

Adapto is now known to reside in the Valley of Hell, a place so named because it spawns various special Shuuki. This location has a terrifying record of anti-demon corps casualties, including several commanders. The number of commander-level casualties in this valley has reached double digits.

The mission aims not only to conquer Adapto but also to eradicate all special Shuuki gathered there. Adapto is being targeted by many special Shuuki, making the situation even more critical.

The joint forces, along with commanders from each corps and some retired seniors, are joining this military operation. If Adapto is not eliminated immediately, it could spell the end of Earth's civilization. Its adaptive ability has gone beyond comprehension, and nothing can stop it if it is allowed to develop further.

The trust of the anti-demon corps and the world's governments rests on the current generation of humanity, especially a young girl named Ren Yamashiro. With her unique ability, Vairocana [The Boundless Universe That Shapes All Creations] from Buddhist mythology, Ren is believed to be able to overcome this disaster.

In front of the Valley of Hell, tension is palpable in the air. Every member of the forces feels their skin prickle, including Ren, who commands the entire operation. With great pride, Ren does not let her fear show, even though she knows this will be a battle between the pinnacle of humanity and the world's greatest threat.

As Ren enters the valley, she feels the oppressive air, forcing her to use her abilities to create comfort. Strangely, no special Shuuki appear despite her spreading spiritual energy to attract attention. This makes her irritated, and she walks further into the valley.

During her journey, Ren discovers a giant door spanning the cliff landscape. 'As its name suggests, the Valley of Hell. Is the gate to hell also here?' she thinks as she touches the cold surface of the door.

With curiosity, Ren pushes the door and peers inside. "!?" Her face turns pale with shock upon seeing the towering pile of special Shuuki corpses. The stench is so overpowering that she has to pinch her nose.

However, her curiosity remains. Amid the mountain of corpses, she senses a dangerous aura. Carefully, she walks closer to see the source of the aura.

At the top of the pile of Shuuki corpses, in front of the corpse of Adapto with a hole in its abdomen, Ren sees a muscular man with waist-length hair and purple eyes, staring at her with a vacant gaze.

Ren immediately prepares herself, sensing danger from the man, but the danger she feels does not come. Instead, the man collapses, losing consciousness in front of her.

The woman, still filled with curiosity, approaches the man and touches his long, tangled hair. No movement, no threat emerges. She exhales a sigh of relief, feeling slightly more at ease despite the tense situation.

"Chief Ren, are you still there?!" Her subordinate's voice comes through the radio, filled with anxiety and tension.

"Yes, it's better if you come in and see what's happening here," she responds while observing Adapto's corpse standing upright before her. For a monster, Adapto did not fall like the others but died standing, as if it were a great warrior holding its position until the end.

Adapto, with its body full of wounds yet standing firm, looks like a statue of a hero fighting to the last drop of blood. The dim light from the valley highlights its face full of resolve, even in death. Ren stands silent for a moment, admiring the strength and perseverance of the creature dubbed a walking disaster.

"Understood," the voice on the radio replies briefly, indicating the team is moving towards her position.

While waiting for the team's arrival, Ren tries to comprehend this strange situation. The air around her feels heavy with the pungent stench of the Shuuki corpses scattered about. She covers her nose with her hand but still feels nauseous.

The man in front of her, with his muscular body now limp, appears to be a figure full of mystery. His long hair, touching the ground, is dark and tangled, contrasting with his pale skin. His purple eyes, previously vacant, are now shut tight, indicating he has truly lost consciousness.

Ren examines the man more closely. There are no signs of serious injuries on his body, but there is something different. The powerful aura she sensed from this man has diminished but is still present. Something makes Ren feel that this man is not an ordinary human.

As the team begins to enter the valley, Ren directs them to be cautious. "Watch every step, and make sure no one is left behind," she commands firmly.

The soldiers start to spread out, checking every dark corner of the valley filled with corpses. Ren remains vigilant near the man, ensuring the situation is truly safe.

"This valley truly deserves to be called the Valley of Hell," she mutters, looking around cautiously.