Garessta

In this world riddled with strife, where even kids know spells, and powerful mages are nobility, Cael was born with no mana at all. An heir to the family of mages, he was his father’s disappointment, and his city’s laughingstock. But who knew that he had a much different destiny? To prevent a looming catastrophe no one else knows about—to stop the Starspawn. 

“Blood Mage System activated. Greetings, user. I am your Blood Mage System. Consume the blood of powerful creatures to purchase new abilities.”

With that power, Cael will become a hero able to stand against the fate that crushed countless others—even if the world will call him a demon instead.

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Although the novel has a harem and r18, neither are the focus of the story. Cael only has very few (2 right now and at the moment I don't plan on increasing this amount) girls, and there aren't that many r18 scenes. Take that as you may~

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My Blood Mage System

For the next several hours, Cael and Princess—who was now the Nest's queen, but he still called her Princess, which she didn't seem to mind—dealt with the consequences of the fight.

Princess licked her wounds and rounded up her lesser dragons. The little lizards obeyed her groaning calls with no hesitation, and could do simple tasks like patching holes in the Nest's walls, cleaning up the broken eggs and dealing with Queen's massive corpse.

The latter they and Princess did in the most direct yet morbid way possible—they ate her, or at least began to. But only after Cael drained the body from all the blood. The swamp dragons had no qualms against cannibalism.

After this, Princess addressed Cael.

"Queen left many sons—enough that I don't need to lay eggs yet. But I will have to, and for that, I will have to let out a mating call… Even so, it might take a while."

System upgrade