Akame ga Kill: Starting with Dual Kamui - Chapter 76: The Establishment of the “Akatsuki” Organization

Cain was an ordinary boy who loved creative works, especially when it involved anime and games. Suddenly, he found himself in a strange space with an extraterrestrial creature, a cosmic horror called Bishop that he couldn’t explain in words besides scary.Given the authority of a King, he was tasked to create dungeons in the multiverse in order to change his future. He had been turned into the Dungeon Maker. The more known his dungeon was, the stronger he became!Rias: What are you? A Devil?Dante: Now, now. What are you? Wow, I drank too much. Look at her, a sexy devil.Zoro: Where am I? Is that a sea monster? Good, I will bring meat for Luffy.Helldiver: For Democracy!!!All worlds became connected due to the dungeon. However, don’t worry!Everything was under his control.

Zhao Chuchu was reborn in a time before the apocalypse. As soon as the space was filled with supplies, something fell from a high altitude and killed her. Then, she transmigrated, becoming a small villager in an unknown dynasty. She started this new life by taking out the natives, dealing with the plague, and becoming a divine doctor in one fell swoop. Using her fists, she gained high status. She bullied those scums until they cried for their mommy and begged for mercy. She produced large quantities of rice, beans, and sweet potatoes… She could do everything, and she earned a lot of money with that. Everyone watched as she reconciled with Xiao Xiucai. They watched until a baby was born, as well as until Xiao Xiucai became the top scholar and smoothly became the Chief Minister. Then, everyone waited for the day the Chief Minister would divorce his wife, who went through hardships in life with him. They waited and waited until the couple had grown old, the two living together for the rest of their lives.

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

This is a cliché story about two young people saving the world.