Endless Plunder in High School DxD

Days passed joyfully and peacefully. Tenraku thought this life would continue until his daughters graduated from university, and he planned to accompany them all the way. However, fate had a miraculous and astonishingly similar twist in store...

During the girls' third year of high school, the entire world underwent significant changes. Tenraku and the girls found themselves battling various powerful enemies and ultimately stood at the pinnacle of this world's power.

This time, when the daughters were in their third year of high school, another tremendous change shook the world. It wasn't the threat of the Khaos Brigade or various other enemies and conspiracies but a Planar War!

As Evil Dragon Apophis had once said, Rizevim had transmitted the coordinates of this world to another dimension. This invasion wasn't merely a threat but a full-fledged war.

In the midst of all this chaos, the enemy brazenly issued a declaration of war. Thus, at the age of thirty years of peace, the intelligent life forms from the other world finally arrived, sparking a Planar War!

The other world was a fascinating realm where benevolent elves coexisted with evil mechanical beings. 

These elves and mechanical entities possessed power comparable to the angels and demons of this world. The invaders were the mechanical beings controlled by the Evil God Melvazoa.

The sudden attack caught this world off guard. Due to the differences in rules and power systems, conventional magic had minimal effect on the mechanical beings. Initially, this world suffered heavy losses, but it was Tenraku and other leaders who intervened and managed to stabilize the situation.

Thus began a protracted Planar War that lasted for decades. Countless heroes emerged during this time.

Tenraku and his wives, as expected, were always at the forefront of the battlefield. Even Gasper, who used to cry and wear girls' skirts, grew into a handsome and reliable man. 

Awakening to the powers of his past life as the Demon God Balor, he reached the level of a transcender and became one of Tenraku's top generals, known as the "Tyrant of Time-Space."

Apart from Gasper, Tenraku's daughters also rapidly matured through baptism in this war and became invaluable assets in the conflict.

Meanwhile, the trio of Hyoudou Issei, Motohama, and Matsuda, known as the Oppai Trio, were nearing fifty when the Planar War erupted. Despite their age, they continued their hero duties and joined the battle to represent humanity.

In one instance, Tenraku and the leaders of various factions engaged the enemy in a fierce battle at the dimensional border. 

Seizing the opportunity, the cunning enemy dispatched hundreds of thousands of mechanical soldiers to invade the Human World and attack their rear base. In this critical moment, Hyoudou Issei, Motohama, and Matsuda stepped forward. 

Using magic once wielded by Rizevim, they absorbed the energy of all the women in the Human World to create a vast army, preventing a catastrophic disaster.

This act elevated the trio to the greatest heroes in human history. However, their lifelong dedication to heroism took a toll on their health. When they were in their seventies, still bedridden, Tenraku offered to heal them and even extend their lives by turning them into devils or angels. 

However, they chose to decline. They felt their lives had no regrets. They entered this world as humans, and they wished to leave as humans. Tenraku respected their decision.

After the passing of Hyoudou Issei and his companions, leaders from various races and factions came to mourn their deaths. Tenraku erected three giant statues in Kuoh Town to honor them.

These statues of three men with oversized breasts may have seemed humorous to some, but those who knew their stories held them in the highest respect. They were heroes of humanity and the world. Their descendants inherited their magic and will, continuing the legacy of protecting humanity and the world.

Several years after the trio's passing, the world finally developed safe teleportation technology to the other world. Tenraku was the first to try it.

After many twists and turns, Tenraku finally encountered Resetoras, the benevolent god who governed the elves in the other world. 

After many events, Resetoras and Tenraku became engaged, with Resetoras becoming Tenraku's wife. The alliance between the elves and the realm of Tenraku against the cruel Evil God Melvazoa marked a significant turning point in the Planar War.

With Melvazoa's defeat at the hands of Tenraku in the Dimensional Gap, the remaining mechanical beings surrendered, bringing an end to the decades-long Planar War. Both worlds suffered immense losses and destruction, but what followed was a long period of peace and cultural integration.

As an important leader of the demon realm and the husband of the Elf Queen Resetoras, Tenraku maintained stability and balance between the two worlds. 

The Saints and Demons Religion also began to spread in the other world, gaining billions of elf girls and mechanical maidens as believers among Tenraku's followers.

Over the next few centuries, Tenraku once again lived a peaceful and happy life with his wives and daughters. However, one day, hundreds of years later, in the elf world, Tenraku and his companions discovered the existence of yet another parallel world!

The collision between civilizations inevitably began with war, and thus, the peace that had lasted for centuries was shattered, and war erupted once again! 

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After decades of the Planar War, it finally ended with victory on Tenraku's side. But after enjoying centuries of peaceful times, new parallel worlds were discovered!

And so, in the endless ages that followed, Tenraku led his warriors and believers to conquer one world after another. However, with each conquered world, a new neighboring parallel world was soon discovered.

Enjoy peace... conquer parallel worlds... enjoy peace... conquer parallel worlds... It was like entering an infinite loop!

After countless epochs, Tenraku had conquered countless worlds and become the ruler of numerous realms! One day, he discovered yet another new parallel world. But as soon as he entered it, he was stunned.

Because this world was none other than the world of High School DxD, where he met his wives and where his life began...

After circling through a vast and endless loop, experiencing countless epochs, everything had returned to the starting point! Standing amidst the primal chaos of the void, a moment of enlightenment suddenly dawned upon Tenraku's heart.

The starting point was also the endpoint. It seemed that his long life and journey could finally come to an end...

With inexplicable laws flashing in his eyes, Tenraku gazed into the distant void, and a scene appeared before him. In a distant dimension, an ordinary young man was hit by a speeding truck and lay in a pool of blood, losing his life.

Although countless epochs had passed, Tenraku recognized him at a glance. It was his former self.

Utilizing his supreme power, Tenraku seized his former self's soul from another dimension.

"Where am I? Am I not already dead?" The bewildered young man murmured as he opened his eyes.

"You are dead," Tenraku replied calmly from the hidden depths of the void.

"W-who are you?" The young man asked nervously, trying to maintain composure.

"What am I? You will know someday," Tenraku said with a sigh, his heart filled with endless complexity.

Realizing something, Tenraku gathered his power and condensed it into a jade jewel, controlling it to float in front of the young man.

"This is called the Sacred Gear Plunder. It can plunder any Sacred Gear," Tenraku explained softly. "Use it wisely, and then pass it on to the next generation of saṃsāra."

Tenraku repeated the words he had once said to his former self to the future self. Then, he embedded the jade jewel into the young man's soul and waved his hand, sending him into the world of High School DxD.

In the boundless silence, standing alone in the void for a long, long time, Tenraku's figure suddenly dissipated.

His story had come to an end...

But—

A new saṃsāra had begun!

The End of The book!!!