MTL - Master of Ninja World - Chapter 3 System spirit

Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the very world, only to meet an end filled but with betrayal. The companions that he’d trusted throughout his journey betrayed him and killed him by sticking a blade through his chest.

Min's system, System #151044, is tired of watching him get girls and make dumb decisions yet still manage to defeat the villain. If only he was the villain, there's no way Min would win.

His wish was granted. He now upgraded from a bodyless helper system to the evil villain, Ronin Dreadborne!

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After getting murdered and reincarnating as a system inside a Hero Transmigrating Machine, System #151044 spent thousands of years wondering why he had such a cruel fate to be a system for incompetent transmigrators like this.

But the worst is Min Cheng............

Because Min Cheng spends all his Hero points on girls instead of leveling up! And he is the dumbest transmigrators he ever met!

But through a rogue system that gave them a code to free themselves from their roles as a system, System #151044 was able to transform into Min Cheng's enemy on the next world, Ronin Dreadborne, in a mage fantasy world!

[Fate itself is evil. The only true enemy is fate, and I have defeated it.]

[And I shall teach you how to defeat it too. I will be giving you the gift of freedom. ]

[Be the master of your fate like you were always meant to be. And conquer those who try to stand in your way.]

That is exactly what he did as Ronin, and to defeat an evil fate, you have to be evil yourself!

“I will be the best villain in all the dimensions! Watch out, Min Cheng! I'm coming for you!”

Time travel to become a false widow, with a little bun beside her.

The parents-in-law were unkind, and the sister-in-law was tricky, so they jointly poisoned her to death.

Dong Yue was reborn. Faced with such a tragic situation, she was too lazy to entangle with these beasts and wanted to take Baozi away.

***

The general knelt down to intercede for the guilty minister: “He was framed.”

Everyone sighed: the general is kind.

Dong Yuezhi: He was the one who framed him.

The general ran to imprison the prince: “The prince will not do anything rebellious.”

Everyone sighed: The general is upright.

Dong Yuezhi: Running around is true, just to let the prince be convicted of the crime.

***

He is the only one who is sincere to her.

“Yueyue, I’m stupid, I can’t say good things, I will protect you for the rest of my life.”

“Stupid mouth?” With a simple and honest face, his mouth turned up and down, making people never turn over, “General, stop pretending!”

He restrained his simple and honest expression, and his eyes were deep and burning: “You are the person I love the most!”

[He has killed countless enemies and achieved countless battles, until he met her, and her every move touched his heart]

[She is versatile, there is nothing she can’t solve, but this man has become a candy that can’t be shaken off]

- Description from novelbuddy

He was on his way to buy some beer to celebrate his acceptance as a civil servant when he was suddenly isekai’d by truck-kun.