MTL - The Roots of Manga - Chapter 244 Ancient 1 and Leviathan

Luo Feng was reborn back in his high school years. From the start, he acquired the Return On Investment System.

[Invest in this coffee shop and you will be able to open many branches in the future. It has an ROI of 100%.]

[Invest in Bitcoins and the price will skyrocket in the future. It has an ROI of 10,000%.]

[Invest in the cute girl who is the deskmate in class and she will become your wife in the future. It has an ROI of infinity.]

Luo Feng decisively chose to invest in his future wife.

…

Many years later, during a press conference, a reporter asked, “Mr. Luo, your White River Investment Company has surpassed Morgan Stanley and Goldman Sachs, becoming the most famous investment management company. In your opinion, what is the most successful investment you have made in your life?”

Luo Feng looked at his wife fondly as he replied, “Don’t ask me. I just live off my wife.”

After being bound to a self-help system, Xia Changhan lived in deep water every day.

System: You have to counterattack and fight beautifully!

Xia Changhan: No, I can’t do it.

System: You can hook up with the scum’s backer, such as his mother/his sister/his fiancee/his boss/his second uncle‘s sister!

Xia Changhan: No, I can’t do it.

System: Perform well or your wage will be deducted.

Xia Changhan: I will work hard!

Xia Changhan was repeatedly commended by the leader of the Space-Time Bureau.

When imparting experience to new colleagues at the year-end meeting, she burst into tears: “I only have three words for everyone- do it yourself!”

- Description from Novelupdates

Waking up in the body of a 6-year-old boy a few years before Cintra is destroyed, Madara receives a system that gives him the ability to gain the powers of Uchiha Madara.[The peak of Uchiha Madara's system is before he becomes the ten-tails jinchuuriki.]The system's percentage does not stop Madara's power, but rather the system's release. After all, I don't want to see a character who goes around killing everyone from the beginning of the story.

Years ago when she was only a young girl, Rose ran away with her two friends Alexander and Mathias, just when they were about to be branded as slaves and sold to work in a brothel. Misfortunate fell on the group as Mathias became stuck and to save them, Rose sacrificed herself to distract the brothel owner’s son Graham who hunted them.Rose made her friends promise that in exchange for her sacrifice, they would return to free her. As the years passed and Rose reunited with her friends, she learned that all promises would not be kept.Stuck in a brothel with a man who wishes to turn her into his woman, Rose starts an unexpected relationship with Zayne Hamilton, a general of another kingdom. Zayne offers to buy her from Graham and opens the way for her sacrifice to not be forgotten.