Leveling through Lust - Chapter 7: Engineered Accidents

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

Zavier met Cosmic Consciousness after his death. He was satisfied with every system that Cosmic Consciousness exhibited, so he wanted all of them. Surprisingly, the Cosmic Consciousness obliged him.

Zavier was reborn in an isekai full of magic and alchemy. Now, he had many routes to upgrade. Interestingly, to coordinate these systems, Cosmic Consciousness gave him the gift of being able to duplicate himself. He could clone a finite number of himself to manipulate these systems.

Magus, Alchemist, Mesmer, Tamer, Hunter, Vampire, Werewolf, Dragonknight, Necromancer.....

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By the way, it wouldn't appear NTR or some bullshit harem of courtships. MC of course will have harem but not for cliches.

The World of Immortals, it is the world every mortal long for. For many, it is an eternal glory to cause a spatial distortion and enter the World of Immortals. But the vicissitude of time is simply merciless, the legends regarding immortality had long been forgotten.

I am reborn as a minor character and the mother of the main character, the deposed ruler Leriana Ashford.My husband's younger brother will stage a rebellion against him, and only my young children will manage to escape. And the unfortunate Queen Leriane faces a bleak end. According to the plot, my heroine will sacrifice her life during the rebellion to save her children.Except she won't! Dying at twenty-seven is too soon for me and I'm going to change the tragic plot of this novella.I was lucky enough to be reborn ten years before the events of the novel began. At a time when the future King Philip and his brother Razor had just fallen in love with me at the Royal Academy, and their fight for me led to a feud. To survive - I decided not to become queen and live a quiet life with my father the Duke. And in order to rid myself of these two, I had to go to extreme measures.I decided to start dating the daughter of the cursed Duke, who is feared and hated by the entire academy.