Kujibiki Tokushou: Musou Hāremu ken - Chapter 18

Wang Sheng arrives in a world sealed by qi, where danger lurks at every turn. Fortuitously, he awakens a progress bar that can break through all limits, turning everything into possibility!Inner Core Skill—Refine essence into qi, the fundamental path, eternal void, achieving true immortality!Ba Duan Jin—Constructing the foundation, limitless qi and blood, rebirth from a drop of blood, the flesh becomes sacred!No Life True Void Induction Sutra—A virtual world, infinite simulation, the name of No Life, spread across all heavens!Heaven and Earth, the Ages—Control of time and space, reversing life and death!...The true immortal watching the winds and clouds is me, the No Life True Saint representing transformation is me, the one who controls time and reverses life and death is me, the one using the true vacuum homestead to harvest all realms is also me!--------------------This is a story of Wang Sheng basing on Ba Duan Jin as the foundation, using Inner Core Skill as the fundamental method, achieving everlasting life...

Once upon a time, a hero had been summoned to a different world in order to defeat the demon king. After the war stretching 3 years ended the commendable hero slew the demon king. And he was forcibly deported back to earth after being dismissed.

Such bullshit!

Elves in addition to beast race, dwarfs and demon race. Even though I wanted to make a harem in the different world I saved! My dream will not come true on earth, where there is no magic at all. Thus, the hero returns on his own. Without the blunder of being extradited to earth this time, he will build a harem of his own in a different world.

An ineffable rebirth, taking advantage of a mystical magic cube that was produced from rebirthing to pass through various worlds(anime, novel, movie, games, etc), collecting whatever I want to obtain!

- Description from MTLNovel

A campus bullying incident led Chu Feng to receive a message of Rong Yun’s suicide after ten years.

Rong Yun’s relic is a novel based on him…

At this point, he came to know that Rong Yun had always liked him.

In deep regret, Chu Feng returned back to high school.

This time, he wants to protect Rong Yun, his achievement and let him have a different life.
At first, he only wants to compensate for his mistakes, but he didn’t know when his compensation become’s true love.

- Description from Novelupdates