Worm (Parahumans #1) - Chapter 2: Gestation 1.

Mu Yu, who had just started university, unintentionally downloaded a mysterious hand tour and was brought to a strange and bizarre world, becoming the first player of the ‘Mystical World’.

By chance, Mu Yu joined an ancient sect that had declined for a thousand years. He successfully repaired the sect’s supreme technique, the Secret Manual of Space and Time, and became its spacetime descendant.

After three months, players officially logged into the Mystical World game. Mu Yu was already the pride of South Sky.

Two years later, when the players had grown up, Mu Yu had already become the most dazzling Saint under the starry sky.

….

At the foot of the Misty Cloud Mountain, a young girl in a white dress nestled in Mu Yu’s embrace as she cried, “I, Nalan Yanran, would rather die than marry that young master of the Xiao family. I only wish to marry you in this life.”

“Ding!” You have successfully triggered a 3-star mission! to help Nalan Yanran go to the Xiao family to end the engagement! ”

“Wait a minute, this script isn’t right. Can’t we just not do it?” Mu Yu felt like crying.

“Either way! Either die! ” The System pulled out a 10m long broadsword.

“Stop, can’t I do it…” Mu Yu submitted.

- Description from Novelupdates

Arthur was a weak and cowardly boy who lacked the power to protect anyone—a truth brutally demonstrated when his parents were massacred while defending him during a Gate outbreak. As the sole survivor, Arthur spent weeks believing his life was over. When intense chest pains began, he assumed he'd been infected with corruption by the void creature that killed his parents and was merely waiting for death.What Arthur didn't expect was that these sensations actually signaled his Realm Core forming. In two months' time, he would be forcefully transported to the next realm and awaken new powers, becoming one of the world-renowned “Chosen” who protect humanity from Gate outbreaks. Now Arthur must rise through the heights of power, climbing each of the seven realms in hopes of saving his world... or does he?

Wang Yi gets a key, opening a door in 2022 will lead to 1982, and opening a door in 1982 will return to 2022.

Two very different great eras appeared before him:

Abundant dietary protection, developed industrial products, miraculous medicines, and explosive information, this is 2022.

Simple folk customs, rich wild resources, scattered antiques, and treasures of the age, this is 1982.

Traveling between these two eras, Wang Yi didn’t think much of it, he just wanted to live a good life.

- Description from novelbuddy