It’s Lonely To Be Invincible - Chapter 1: I Will Never Die

500 years ago, Chen Xi was devoured by a crack in the void and was transported into a cultivation world.

500 years later, he returned back to Earth after enduring through several hardships and discovered that only 5 years had gone by.

…

In the courtyard, beauty at the side, a candle flame wavering.

A gush of clear wind, half a full moon, the peach tree remains unchanging.

…

Wait, whose kid is this?! Why is she calling me papa? Gazing at the little girl in front of him with skin as pale as jade, Chen Xi froze.

…

　
Returning home from cultivation, starting as a stay-at-home dad.

In this life, not fighting to be a king nor claiming to be a tyrant, only praying to peacefully be a wife-pampering mad devil and a child-protecting daddy!

- Description from Novelupdates

An era where the desperate, miserable, and tragic tale of the six heroes who sealed the Dark Mage, who sought to destroy Maple World, became the favorite legend of children.

“The Cygnus Knights have fallen, the Resistance has collapsed, the Cross Hunters have been destroyed, and the adventurers have been annihilated. And the six heroes are dead.”

An era where no one dared to resist the reappearance of the Dark Mage and his followers.

“You are the only one left, El Paume. You’re the last adventurer.”

In that era, there was an adventurer who continued to fight until the end.

"There is a thin line between poison and medicine, and I shall make you dance on it!"

He’s the apathetic, sinister school prince, she’s the silly, joyous new student.

When the simple girl meets the sharp-tongued boy——

Gu Zichen: “Su Niannian, are you a pig!!!”

Su Niannian: “….can you communicate properly, and not attack people like this? Even if I am a pig, then I’m a precious and unique pig!”

When the wounded girl wants to escape from the oppressive boy——

“Caring for precious animals is my duty.” Merely one heartless sentence, and he carries her directly home.

But why did he need to care for her all the way to bed, hey!!!

- Description from Novelupdates