To create Honkai Impact 3rd in a world where Kallen exists.

At dusk in front of the execution platform in the square, he held the lifeless body in his arms, the one that would never smile again. The bright blue eyes were dim, and he just gritted his teeth and held back the burst of tears.

In the Sanctuary of Destiny, he held his sword, staring hatefully at the pool of blood at his feet, his chest trembling violently with remorse.

In the hidden depths of the laboratory, the embryos he needed were developing in the dark green culture solution. Through the glass, he could see his cold eyes.

【All the rest will be torn up whenever a choice is made】

Choose one, and the others will cease to exist.

The Rakshasa people carrying coffins on the land of China only brought back a chivalrous young woman out of touch with the times, and then turned and left.

On the battlefield, he walked towards the First Herrscher, Welt. He was taciturn and indifferent. This plan must succeed, no matter the cost.

Looking at the kind and brave girl who resembled Karen, he was surprised, and his heart, which had been untouched for five hundred years, was touched for the first time.

On the snow-covered plains of Siberia, he wore a mask and gazed at the collapsing snowfield in the distance, calculating in his mind.

In the life-or-death attempt, he watched as the faceless man who claimed to be a god slashed his own neck with a dagger, and his heart trembled.

On his 423rd attempt, he looked at the person who had opened his eyes inside the warehouse not far away, his fingers trembling with unbelievable joy;

【Everyone has their own desire leading to the ultimate】

Many goals, but only one ultimate outcome.

Watching that artificial Herrscher grow step by step, he calmly followed her every step, the sky, the vast expanse... He will definitely succeed!

Within the golden light curtain of the Void Treasury, the negotiation with the World Serpent leader dispelled his last doubts, and he could now do what he wanted to accomplish with peace of mind.

Grasping the power of the Tree of Imaginary Numbers, with a halo shining behind him and the gods blessing him, his eyes are resolute as the final moment approaches.

Then, in the dark red twilight, the plane that had been flying in the blue sky circled and slowly landed in front of the first tree.

Crossing thousands of mountains and ridges, traversing the long river of time, five hundred years have passed in the blink of an eye, and it has returned to its original starting point.

It fell into the hands of Otto after he grew up.

He bent down, gently stroking the worn-out airplane. Beneath the fiery red, billowing clouds, he stood on the grass, gazing at the original invention, perhaps also at the words "Great Inventor" and a warm smile.

【Life is too long to end at a grave】

The epitaph is too short, this life is too long.

Through the clouds, the starry night had emerged, and countless stars twinkled, illuminating his way home.

Shooting stars streaked across the night sky, and a bright bonfire burned before the trees, shrouded in the hazy darkness.

Leaning against that lush tree, the most important person in his life rested on his shoulder.

Little Otto and little Karen snuggled together for warmth, their bodies close together, their golden and pure white hair intertwined, their faces radiating carefree joy.

So warm, so hard to leave.

That was a scene he would never forget, and it represented the future he most longed for.

The stars twinkled in the dark night sky, and the orange light from the flames warmed them. Their little hands were clasped tightly together, fingers intertwined, a vow that they would never be apart again.

They are fast asleep; they will have sweet dreams tonight.

How many evil deeds must a person commit?

How can we bring her back to dawn from the depths of hell?

How far can a person travel?

How can we find our original selves at the end of time?

After a long five hundred years, he finally returned to his original self.

A ghost that should have died five hundred years ago...

He met his final self in the very first moment.

The epitaph is too short, this life is too long.

[MiHoYo carried its speaker and rushed to the battlefield, and then... when it looked back, its face was covered in tears.]

Goodnight, Otto, the great inventor, both hateful and admirable.

"Life is long, but I regret that the epitaph is too short to be remembered."

Durandal sighed, pursed her lips, and gazed at the warm scene in the distance.

The other person's experiences were so magnificent that they could not possibly be engraved on a small stone tablet.

"A wordless monument, huh... Ha—"

She shook her head, trying to shake off those meaningless thoughts. After all, she wasn't his student, but she had become somewhat absorbed in them.

“Otto…Grandpa, um—,”

Theresa was a little stunned. She was unable to move and could only watch her grandmother talk to the other person in front of her, while the other person glanced over for a moment.

"It can be considered a good ending, I suppose. If Grandma agrees, he might be a decent grandfather."

She thought to herself.

"Our original selves? It was quite a long journey, a chase through time back to the past,"