MTL - Emperor of All Games: I Have a Tyrant Simulator - Chapter 331 Enter

A world where awakened individuals with special powers emerge due to a system. At the New Spring Kindergarten infant class, Gru awakens as an S-rank Hunter at the age of 4. Along with this, there is a quest assigned to her… [Quest: A child needs a strong guardian!] Why is a guardian needed? That is because Gru has no mother or father. Gru, who had no family, is adopted by the greatest Hunter in South Korea after many twists and turns, and along with that, new skills are developed… [Let’s try registering a new guardian in the slot!] [Children can earn ‘filial piety points’ through various activities, which can be used in different areas.] Gathering guardians enables faster growth? ‘That’s amazing!’ Alright, I’ll gather all the S-rank guardians!

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

Palace intrigue? I am able to rewind time!So, as a picky and delicate little Servant Consort, she can live a fulfilling life in the harem even without the Emperor's favor.The dishes from the Imperial Kitchen aren't to her liking?Rewind, and get my favorite steamed pork.The color of the fabric given doesn't suit me?Rewind, and this time, I finally get my favorite lake water green.The Emperor wants to sleep with me?Rewind, life without favor is still enjoyable.…The new Emperor Xie Zhixing has a secret.Since his first selection after ascending the throne, his life would inexplicably return to the past—The memorials he just approved are gone!The martial arts he just practiced were in vain!The concubine who was just brought in to sleep with him was taken away!…Xie Zhixing could never grasp the pattern of returning to the past, only considering it as a huge joke from the heavens.Until one stormy day, he met Servant Consort Yun in the Xianfu Palace.Later, he discovered that he had approved the same memorial 25 times that day, just because the Imperial Kitchen didn't make steamed pork for Servant Consort Yun.

A side story series featuring the girls of Kyoukai Senjou no Horizon.