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

The person delivering the news shook his head. In the light of the only lantern in the room, the metal mask that served as his face glinted with yellow.

"I see… A pity," the second person in the room decided. "Although Dante isn't a threat, he's someone who might become it. He's equally easy and hard to control."

"Then, everything goes according to the plan, boss?" the first person asked.

"Yes. We keep watching. This dead end we are in will break soon."

The room Dante accepted his guests didn't change since Cael's last visit. The only difference was lack of damage from the bodies Cael threw at the walls, and the bodies themselves.

Unlike the last time, there was no pipe in Dante's hand. Just in case, Cael tasted the offered treats first before letting Ginevra take any, but they weren't poisoned either.

A mysterious enigma