Am I Both the Savior and the Destroyer?

Blurb One:

One space, two Systems: one saves the world through good deeds, the other destroys it through evil.

Shi Mohan: Someone cut out my bones, carved up my flesh, humiliated me, and hurt me. What should I do?

World-Destroying System: Destroy them.

Shi Mohan: Makes sense!

World-Saving System, sobbing: You're not the kind, adorable little sweetheart you used to be! QAQ

Blurb Two:

When Shi Mohan woke up, he found himself penniless in a strange ancient world, bound to a spatial System that claimed to be a savior.

The System told him that to live a happy, fulfilling life, he had to plant every field in his space and bring prosperity to the people.

As an orphan, Shi Mohan had always longed for a happy, fulfilling life, so he worked diligently in the fields, treated others kindly, and helped his community prosper.

Until... the Ghost Tribe attacked the village, and the hero he saved was poisoned, lost his mind, and tried to eat him.

Until... he was hung from the walls of Yide City and subjected to curses, humiliation, and having his flesh and bones carved away, all to force him to reveal the "treasure" that let him conjure grain from thin air.

Treat others kindly?

Pah!

Every man for himself, and the devil take the hindmost!

As Shi Mohan's conscience wavered, the World-Destroying System hidden in his space stirred to life, tempting him: Does it hurt? Are you furious? I'll help you escape it all.

Chu Rong was a hero renowned throughout the martial world, born into a distinguished family and held in high esteem. One day, while out hunting down evil members of the Ghost Tribe, he was injured and rescued by an adorable young man. The boy was fair-skinned, sweet, and especially kind, and Chu Rong liked him so much that he wanted to take him away and keep him hidden. But on the day before he planned to confess, the Ghost Tribe attacked the village. Chu Rong was poisoned too, becoming a mindless monster who knew only how to eat flesh and drink blood.

The boy smelled so delicious. Chu Rong licked him once, then again. He wanted to swallow him whole, but couldn't bring himself to bite him, so he kept the boy by his side, kissing, hugging, and licking him every day.

Until one day, Chu Rong came to his senses and discovered that his adorable, kind boy had become a ruthless, terrifying demon lord whom everyone in the world wanted dead.

Chu Rong: ???

Where had his kind, adorable sweetheart gone?

Shi, once a kind, adorable sweetheart, Mohan: See the scar on my chest? They dug it out.

Premise: Good and evil are separated by only a single thought.