Demon Slayer: Starting with Genetic Modification

He woke from a dream. No, the System slapped him awake several times.

Ye Zizai was annoyed at first, but the System gave him a gift pack in no time at all.

Reward: Blacklight Virus

Powerful devouring and continuous evolution abilities.

From that alone, you could tell it was unbelievably powerful.

But the System had to nerf it, saying humans would easily go mad after receiving it.

So it was changed to Blacklight Genes.

Still, after testing the genes, he felt they weren't weak at all.

Transmigrating to the world of Demon Slayer.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.