What would you do if you could go back to that era?

When Lin Yi wakes from a dream, he finds himself transported into the world of "The Siheyuan" TV drama. Armed with a "Helpful Happiness System," how will he navigate relationships with the story's iconic characters?

Transported into the world of a Siheyuan courtyard, all he wants is a quiet life—tending his crops, fishing by the lake, and drifting through the slow rhythm of the city's alleys, skirting the edges of human frailty.

To live simply... as just an ordinary man.

Reborn in a siheyuan courtyard with a pocket dimension at my fingertips, I embark on a life of leisurely urban homesteading—raising fish, growing vegetables, cultivating ginseng; selling produce, trading fish, collecting antiques... All while quietly observing the ever-shifting dramas of courtyard life...

Transmigrated back to that passionate era, I became a truck driver.

...

Why did Foolish Zhu—the original "simp"—nearly die without an heir?

Did Qin Huairu and the First Elder actually have an improper relationship?

Whose child is Banggeng really?

Why did He Yushui repeatedly betray her own brother?

What happened to humanity? Where did morality go?

(This is a tale of human distortion and moral collapse!)

Gao Zhendong transmigrates into the world of Siheyuan (The Courtyard). As a newcomer to the quadrangle compound, he boasts an impeccable background: an exemplar of revolutionary pedigree, physically robust, strikingly handsome, and battle-hardened from military service where he earned repeated merits. With advanced university education, technical expertise, ample funds, and a system at his disposal, he possesses both the wisdom of his past life and the system's guaranteed resources—occasionally enhanced by futuristic insights from lucky draws.

Rejecting trivial pursuits and petty squabbles over trifles, he aspires to contribute meaningfully in this zealous and vibrant era. At the very least, he wishes to declare in his twilight years: "These two lifetimes have been worthwhile."

When Kirima Sō is transported into a world ruled by meritocracy, he enrolls as a first-year at Advanced Nurturing High School.

Sakayanagi Arisu: "So... I was never the true genius after all..."

Ichinose Honami: "I've always admired him... longed to become someone like him."

Horikita Suzune: "Please... won't you ever look back at me...?"

Ayanokōji Kiyotaka: "I... am utterly weak..."

Kirima Sō: "Enemies will bend the knee! Women will fall for me! This isn't fantasy—it's destiny, as certain as the sun rising in the east! Every last one of us will graduate from Class A! Our year will become legend! All of this... is divine will!"

As the Demon Lord, Yuuye finally arrived in his dream world of peaceful everyday life, fully intending to laze around and enjoy a carefree existence.

But why does that useless angel Gabriel from downstairs keep mooching his Wi-Fi and hogging his computer to play games?

Enough is enough!

Does she think this Demon Lord survives on salads?

You’ll pay my electricity bills with your very self!

Then there’s that chuunibyou neighbor upstairs who claims to wield the "Evil King’s True Eye"—stop jumping out the window for no reason!

At school, things get even messier.

Some blonde twin-tailed classmate named Eris? Keeps pestering him!

A gloomy, bespectacled girl in the library stares at him like she’s thirsting for his body… Sanshokuin Kinko, was it?

After school, a gorgeous teacher tries to recruit him into the Service Club?

No way! Who’d join a club with such a sketchy name?!

This Demon Lord absolutely will not...

The year he was born, Yemon saw the name "Higurashi Kagome" on the neighboring infant's name tag and began his long wait.

At age five, citing their shared shrine family heritage, he deliberately approached her in kindergarten and frequently visited the Higurashi Shrine.

At twelve, he encountered Kadōin Yura on the street and shamelessly sought her guidance in Onmyōdō arts, advancing his preparations.

Now, on his fifteenth birthday, fate is set in motion.