Description

I, Luke, the Fifth Prince of the Celestia Empire, had a sister one year my junior.

My sister Diana, the cutest in the world, loved me dearly, but in truth, she was fated to fall into darkness and die.

This is the world of "Chris Knights," an RPG game I played in my previous life, and Diana is destined to become the Demon Lord killed by the protagonist.

My beloved sister, dying in ultimate despair?

I cannot allow such a future.

I decided to defy fate, striving diligently since infancy.

My sister would fall into darkness because her mother was assassinated and she was used as a tool of war by our father, the Emperor.

I will utterly destroy that game scenario.

This is the story of an unassuming prince who aims to become the strongest in order to protect his sister from succumbing to darkness.

Also posted on Kakuyomu. #1 in Isekai Fantasy Weekly

	I was reincarnated as a villainous prince who died before the game even started ~ My favorite heroine... Kakuyomu https://kakuyomu.jp › works Episode 1: Reincarnated as Prince Mob, the brother of the final boss. December 28, 2024; Episode 2: Prince Mob, who was supposed to die before the game began, was the greatest magical genius in history. December 29, 2024; Episode 3: Prince Mob...
	I was reincarnated as a villainous prince who died before the game even started ~ My favorite heroine... Become a Novelist https://ncode.syosetu.com › ... I was reincarnated as a villainous prince who died before the game even began. In order to be happy with my favorite heroine's younger sister, I put in excessive effort to master the weakest magic, "Dark Blade," and it turned into the most powerful and overpowered magic.
	I was reincarnated as a villainous prince who died before the game even started ~ My favorite heroine... Alphapolis https://www.alphapolis.co.jp › novel ...and fall into darkness. I'm going to completely destroy that game scenario. This is the story of a mob prince who aims to become the strongest in order to protect his fallen sister. Also serialized on Kakuyomu...
	I was reincarnated as a villainous prince who died before the game even started ~ My favorite heroine... Become a Novelist https://ncode.syosetu.com › ... Please log in to use the bookmark function. Close. I was reincarnated as a villainous prince who dies before the game even starts ~ In order to be happy with my favorite heroine's younger sister, I use the weakest magic, "Dark Blade," excessively...
	I was reincarnated as a villainous prince who died before the game even started ~ My favorite heroine... Tsugikuru https://www.tugikuru.jp › content Feb 8, 2025 — I was reincarnated as a villainous prince who died before the game even began. In order to be happy with my favorite heroine's younger sister, I put in excessive effort to master the weakest magic, "Dark Blade," and it became the most powerful and overpowered...
	Episode 2. The prince who was supposed to die before the game started becomes the greatest... novelup.plus https://novelup.plus › story Jan 22, 2025 — Episode 2. The prince who was supposed to die before the game began was the greatest magical genius in history. "Your magical powers are starting to subside. I'm so glad..."
	Episode 3. Prince Mob protects his sister from the devil - He dies before the game even begins... Kakuyomu https://kakuyomu.jp › episodes I was reincarnated as a villainous prince who died before the game even started. In order to be happy with my favorite heroine's younger sister, I put in excessive effort to master the weakest magic, "Dark Blade," and it turned into the strongest, most broken magic.
	Episode 23. Prince Mob falls in love with the princess of a neighboring country Alphapolis https://www.alphapolis.co.jp › novel I was reincarnated as a villainous prince who dies before the game even begins ~ In order to be happy with my favorite heroine's sister, I mastered the weakest magic, Dark Blade, but it turned out to be an insanely powerful spell ~ \| Episode 23.
	"I was reincarnated as a villainous prince who died before the game even started ~ My favorite heroine..." Kakuyomu https://kakuyomu.jp › users › news 3 Feb 2025 — "I was reincarnated as a villainous prince who died before the game even started. In order to be happy with my favorite heroine's younger sister, I put in excessive effort to master the weakest magic, "Dark Blade," and it became the most powerful and overpowered..."
	Episode 24. Prince Mob protects the princess and gets revenge on the Prince of Light. novelup.plus https://novelup.plus › story Feb 12, 2025 — I was reincarnated as a villainous prince who died before the game even began. In order to be happy with my favorite heroine's younger sister, I put in excessive effort to master the weakest magic, "Dark Blade," and it became the most powerful and broken...

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I was reincarnated as a villainous prince who died before the game even started. In order to be happy with my favorite heroine's younger sister, I put in excessive effort to master the weakest magic, "Dark Blade," and it turned into the strongest, most broken magic.

Description