Beware of Abyss

He reincarnated as the son of a demon. He was a human back then, so he didn't know what it is like to be a demon therefore he went to a journey to become more demon like.

Now, he is back after a journey. The one who was a kid now became an adult.

The one who was just a spark now became hell.

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There will be Yuri and incest.

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There will be a lot of snu snu, so if you don't want like that it is not your cup of tea.

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No NTR.

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MC will be sociopath, psychopath, possessive, obsessive and selfish, so beware.

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This is pure fiction, so there is no resemblance toward the real characters or circumstances.