MTL - Deep Sea Survival: Start a Submarine (Deep Ocean Survival: A Submarine From The Start) - Chapter 6 first dive

As the ruler of a munitions empire, Tang Mo unexpectedly fell and was transported to an entirely different world, where he also unexpectedly acquired a “King of Munitions” system.In this underdeveloped world, Tang Mo relied on the abilities granted to him by the system to drive the development of the entire world.After all, the desire for civilization conquest had always been the driving force behind progress, and life had continuously evolved between attack and defense over tens of millions of years...So, selling assault rifles to these archers and training knights to be tank operators... there shouldn't be any problem with that, right? XD

After a shocking reincarnation, our hero opens her eyes to a new (and messy) world the last thing she remembers is reading Lady Viper’s Vow, a dark fantasy novel about a cruel, misunderstood villainess and her path of doom. But when our protagonist finds herself reborn right in the heart of an attack, she’s moments away from a second, way-too-soon death. Just as she’s about to face the end, a mysterious “system” pops up with a single mission: Level Up or Die Trying. It’s bossy, snarky, and her new best friend. As she levels up into a borderline-cheater powerhouse, she discovers her fate isn’t to be a hero, a princess, or even a sorceress, but to protect the one person no one ever expected her to side with: the villainess herself.

Before rebirth, Xia Man had been wondering, when did Qu Zhen begin to hate her?

Was it when she foolishly followed behind her and constantly talked while eating? Or when she would always clumsily break the gifts she was given? So she started hating her?

Did she think such a person was not worthy of being her friend at all? Doesn’t deserve the sunshine?

Right! Sunshine or whatever, it can only be her Qu Zhen!

Xia Man always felt that the friendship between the two people was like Qu Zhen’s alms to herself, never equal.

Xia Man didn’t understand what Qu Zhen meant until she died.

“I thought I never missed it. Now I understand that I’ve never been right.”

Qu Zhen, in a sense, died by Xia Man’s hands, not from a zombie.

Qu Zhen, you could never have been right after doing something wrong. You should never fall in love with a person with a distorted personality.

After Xia Man was reborn, she only wanted one thing.

She wanted those who used her to hurt Qu Zhen to die rather than to live!

- Description from Novelupdates

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.