23:44.

In the empty light rail station, Gu Shen glanced down at his watch while running.

Can he still catch the last train... He was a little worried, but a low whistle immediately sounded in the distance.

"Rumble--"

In the dark tunnel, thousands of brilliant arcs of light burst out in an instant. The last light rail train slowed down slowly and stopped smoothly in front of Gu Shen.

Seeing the train, Gu Shen just breathed a sigh of relief, then frowned and held his breath.

When the compartment door opened, a smell of rust came out.

He took two steps back and looked at the train. The carriage was old and the exterior was mottled and rusty. Three neat numbers were written in white paint next to the window:

Zero zero one.

"If I remember correctly, Didn't Dateng City...have eliminated this kind of train a long time ago?"

"Didi didi——"

There was no time to think too much. At the last moment when the carriage door closed, Gu Shen ejected from his waist and squeezed into the carriage with no risk.

Holding the armrest, he breathed a sigh of relief.

An inadvertent glance from the corner of my eye.

"Oh hoo..."

Gu Shen's heartbeat slowed down a beat.

On weekdays, this light rail goes to remote suburbs, and there is usually no one else on the last train but just you, but today...

There is another girl in the carriage.

Gu Shen felt that his heart was about to melt. This girl was sitting opposite him, less than thirty centimeters apart. She had almond-shaped eyes and peach cheeks, and long hair. She was wearing a pure white lace dress that was so thin that it was almost transparent, revealing her pink skin.

On the shoulders, there is a large area of ​​skin like snow.

That thin skirt is very white.

But the girl is even whiter, so white that it's a bit dazzling.

The girl didn't wear any shoes, and she tiptoed lightly on the floor of the carriage... There was a heavy book half-opened on her knees, and she was reading the thick book quietly.

This girl was too perfect, with an indescribable and unique temperament, unlike a real person in the real world. Looking at her, Gu Shen felt like he saw a beam of light.

Quiet, gentle, holy, ethereal.

While turning pages, the girl raised her head.

The two looked at each other, and Gu Shen quickly looked away, rubbing his hands and sighing, hastily covering up his gaffe.

He suspected that he was dreaming.

How could there be such a beautiful girl in this world?

Also... doesn't she feel cold when she wears so little?

I really want to lend her my coat.

…

…

【The second person...gets on the bus.】

The girl raised her head, surprise flashed in her eyes, then closed the book and looked at the young man boarding the bus seriously.

Although this young man is now huddled in the corner of the train, rubbing his hands and exhaling, giggling to himself, he has no idea what "getting on the train" means.

But she knew very well that this couldn't be a coincidence.

"Woo——"

The light rail started slowly, and electric arcs splashed back and forth against the tunnel walls.

Although this train is old, it runs extremely smoothly.

The sound of electric arcs ricocheting outside the window penetrated the glass, leaving only a dull sound like the rustling sound of rain washing away.

Neither of the two people spoke, they just kept quiet. If no one spoke, the light rail would pass through the long tunnel and travel silently for about twenty minutes to the terminal.

But this calmness did not last long, and was soon broken by the girl's clear voice.

"A very important question: Is there a real π between 3 and 4...?"

Gu Shen thought he was hallucinating.

Are you talking to yourself?

He turned his head in surprise, looked around, saw the empty interior of the carriage, and met the girl's gaze that was staring at him seriously. Gu Shen pointed at himself, and the girl nodded seriously.

He smiled awkwardly, seeing that the other party was actually having a conversation with him.

"Between 3 and 4...is there a real π?"

What kind of problem is this?

The answer is of course yes.

But at this time, Gu Shen hesitated and did not answer directly.

The reason is also very simple.

Because the clear pupils of the girl looking directly at him reflected an extremely serious look. This look made Gu Shen believe... This seemingly simple question was not that simple.

The girl stretched out a hand and pointed behind Gu Shen.

Gu Shen turned around.

The interior of this old carriage had mottled murals carved on it at some point... It was vaguely visible that it was an old scale with a long scale, and it was unknown where it ended, but it could be clearly seen at this moment.

It’s the two numbers 3 and 4 marked in bold above.

"If you touch this ruler..."

The girl stretched out a hand and touched the ruler in the air. Her voice became softer, like a gust of wind sweeping through the carriage, with a touch of sadness.

"Can you touch π?"

Gu Shen was startled.

He suddenly understood the true meaning of this problem, an infinite non-cyclic number, a number that only existed in theory.

The precision of this number is infinite.

The precision on the ruler is limited.

Even if this ruler is magnified hundreds of millions of times, there will never be a point that belongs to "π" with infinite precision.

"Gu Shen...what's your answer?"

Gu Shen was a little confused, did she know his name?

The hand that the girl stretched out slowly spread out, with silver cross patterns flowing on the palm, emitting a glow.

The moment he saw the glow of the cross, Gu Shen felt familiar and warm, as if he had returned to an old dream. He couldn't help but make the same action. The young man stretched out his hand, wanting to interlock with the girl's fingers.

"Pfft."

Seeing this action, the girl smiled.

There is no imaginary touch.

The girl in the pure white gauze skirt closed her hands and retreated, bit by bit, to the end of Gu Shen's sight. The girl's smile disappeared bit by bit, and in the end only solemnity and solemnity remained.

"Gu Shen..."

"...live."

The wind in the carriage suddenly dispersed.

"Boom, boom, boom!"

The light rail exits the tunnel——

The light source shrouding Gu Shen's head instantly shattered.

If daydreams really exist in this world, then what Gu Shen just experienced was the most wonderful daydream in his eighteen years of life, even though it happened at night.

But the light rail exited the tunnel and the dream was shattered.

He suddenly realized that... everything had changed. The moment the mottled train pulled out of the tunnel, it seemed as if it was washed away by an invisible force.

The light rail began to tremble, and the entire car was caught in violent vibrations, like a curved steel snake body, bumping and undulating, and all the arcs splashing outside the window were extinguished at this moment.

The wheel hub collided with the rail, and the ear-piercing friction sound shattered this sweet dream.

Gu Shen looked at the scene in front of him with horror.

The light in the entire carriage dimmed and it was still empty.

But the girl's seat was taken by a tall woman in black dress.
To be continued...