Villain: Supreme Parasite System in Another World

What happens to someone who has lost everything?What becomes of a man who lost his family and was denied justice by those in power?"The law failed me, so I will become my own justice."Those words marked the beginning of Francis's vigilante life.It was a path soaked in blood, where justice and insanity slowly blurred into one.When his revenge was complete, he welcomed deathready for it all to end.Fate, however, denied him peace.[Record achieved: Highest number of direct kills in your world.][You have fulfilled the requirements to claim the SUPREME PARASITE SYSTEM.][Mission: Evolve into a Category 10 Beast within one year.][Reward: 3 Revival Vials can resurrect anyone of your bloodline.]His eyes snapped open, his mind drowning in memories of his lost family."I'll bring you all back no matter what."