I Want to Transmigrate into a Book Alongside the Imperial Preceptor

Yan Xi is an emperor, and his national preceptor has died.

After putting his affairs in order, he plans to be buried with the preceptor.

A System named First-Generation Zero comes to him with a mirror and explains that the preceptor died young after exhausting his cultivation, leaving a heap of karmic debt unpaid. The transmigration bureau dragged him into a System to toil away like an ox.

Good news! With this mirror, His Majesty can find the preceptor!

Bad news! The preceptor has to immerse himself in the story, so his memories have been sealed!

Yan Xi: "Then can I transmigrate into a book with him?"

Wonderful! This is what he deserves after rising early and working late to govern the country!

Oh, his national preceptor! The immortal-like man he has admired for so long, his salvation!

The one and only person his heart has ever yearned for.

The one he holds closest to his heart, his Tang Ruohan.

Of course he has to find his national preceptor and transmigrate into a book alongside him.

In the first life, Tang Ruohan ends up in a typical cultivation novel where the immortal Venerable gets mistreated. He becomes the Immortal Venerable Mingyu, Yin Luotang, and cultivates the heartless path. With his memories wiped, he is especially formidable, having just sealed away the Demon Lord.

After First-Generation Zero tosses Yan Xi into the story, he discovers that he is the Demon Lord.

Yan Xi: ...

The next time he sees Tang Ruohan will be five hundred years from now! Five hundred years!

But through the mirror, he discovers that Yin Luotang is being drugged by his own disciple, Qin Yue.

Yan Xi: "Zero, give me a golden finger."

Zero: "..."

Yan Xi blinks and opens his eyes in Mingfeng Sect, only to discover that he has taken over Qin Yue's body.

Yan Xi sighs: "Zero, I'm going to kill you."

But the Immortal Venerable's cultivation has already vanished, and he is showing helpless, yielding signs of distress.

Yan Xi looks at his former national preceptor, once so proud and lofty that he never deigned to look him in the eye, now curled up and trembling on the bed in the immortal palace, tears wetting his lashes. Every "give it to me" comes out in a sob, and the desire in Yan Xi's heart grows stronger by the moment.

After getting what he wanted, Yan Xi discovers the cruelty of this world: Qin Yue's cultivation is too weak to defeat anyone.

So when the Scarlet Wolf tribe comes to abduct him, Qin Yue is knocked unconscious with a single punch.

Yan Xi's soul leaves his body.

First-Generation Zero acts again.

This time, Yan Xi wakes up in the body of the Scarlet Wolf chieftain.

Zero, I swear I'll wipe out your entire clan.

In the second life, Tang Ruohan transmigrates into a novel about male pregnancy, becoming a disabled member of a third sex in a wealthy household.

When Yan Xi follows him, the transmigration bureau intercepts him. His dear Zero provides no protection for the new world, and Yan Xi is struck by lightning on arrival, left half-paralyzed.

Though Tang Ruochen, the identity Tang Ruohan has transmigrated into, has lost his memories, he is still the same proud, aloof national preceptor at heart. Yan Xi thinks he's doomed. Given the preceptor's personality, how could he possibly help him?

But Tang Ruochen drags him home and secretly keeps him in his bedroom.

Yes, no one wants to marry Tang Ruochen, but his desires are perfectly ordinary, and he needs a useful massage aide who won't stand up and ruin things for him.

Yan Xi's new body is very frail, but it's his own body, so... it's very useful.

After trying him out a few times and deciding he would do, Tang Ruochen holds a simple wedding, draws up the paperwork, and marries the sickly man.

From then on, whether Tang Ruochen is farming, inspecting estates, trading goods, or going to the capital to purchase supplies, he always brings his sickly husband along in a soft sedan chair.

The fields, farmhouses, estate courtyards, merchant caravans, and inns in the capital all bear traces of their time together.

In the third life, Tang Ruohan transmigrates into a campus novel and becomes Song Tang, a soft, sweet transfer student. On his first day, he offends the school bully, the top student, the basketball team captain...

Yan Xi follows close behind, just about to marvel that the hateful System has finally repaired his body...

Then he discovers that he's become a newly hired, probationary gym teacher.

Yan Xi: "..."

Zero, get over here. I promise I won't hit you.

Protecting a vulnerable student in his capacity as a teacher isn't as hard as Yan Xi imagined.

...If only the national preceptor didn't corner him in the equipment room after school.

"Teacher, why are you protecting me?"

"...A teacher is supposed to protect his students. Wait, don't come any closer!"

Wonderful, my teaching credentials are melting like cream.

In the fourth life, Tang Ruohan transmigrates into a modern urban setting and finally gets a role that suits his character: Tang Shu, a celestial master at the Supernatural Affairs Bureau.

Yan Xi is halfway through being transferred when he discovers that his System has crashed.

When he opens his eyes again, he has forgotten his past.

He has become Zhao Qianzhou, an ordinary police detective in the Hegang branch of the Supernatural Affairs Bureau.

Tang Shu, remembering everything, opens his third eye with tears in his eyes and looks at the lover who has accompanied him through countless worlds.

Your Majesty, I came too late...

Wait, Your Majesty, why are you looking at me like that?

In the fifth life, Yan Xi's System crackles as it returns to normal.

Then the System realizes in horror that it has taken Yan Xi back to the year the Great Yu dynasty was founded, just before Yan and Tang first met.

Tang Ruohan stands silently at the end of a mountain path, on the other side of a stream.

He is still dressed in spotless white, with a red thread trailing from his wrist: the same thread Yan Xi held to his chest when he went to join the preceptor in death.

The prematurely deceased national preceptor of the future and the emperor who once chose to die for love gaze at each other across the stream. In each other's eyes, they see a familiar flame.

A gentle, devoted, secretly-in-love gong who is later forced into coercive sex x a cool, pure-looking tsundere temptress shou

* In the first world, the gong's body is a minor avatar, not an actual possession. The System created a fake body for him.

* It looks like a groveling chase, but they are secretly in love with each other. The national preceptor has his own reasons.

* The emperor is definitely a sweetheart!

* How is this not a groveling chase after all?

* Includes the shou's point of view.

One-on-one, happy ending, pure sweet romance

Blurb captured in July 2026 √

Theme: Companionship is the longest love letter.