Void System: My Magic Can Devour Anything

Dimensions of Light and Dark had crashed upon Earth. Demons and natural disasters threatened to destroy humanity, but angels stood in their way. They united humanity under their wise guidance and taught them how to use a new power of Psionics that had awoken in their souls.

400 years later, there was a boy called Zemin, who thought that he would become a farmer after he grew up—until his parents were killed by a demon. He was saved by a divine miracle—a Void System that appeared in his soul.
It was a weapon that could consume anything, even the Earth itself—but it could also let Zemin use his own crippled talent.

To protect his sister and Holy Dominion, Zemin would wield the Void System and Psionics to destroy every single demon on Earth.

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No NTR, or incest. Yuri in FMF threesome.