Hogwarts, the Potions Prince Doesn't Want to Clear His Name

Snape, who traveled back in time as a student, faced a broken family, eager predators, and the coming dark age. Severus Snape smiled. The magic potion is the truth. Capital is power. He offered poison to Voldemort and gave Dumbledore a life-saving cure. Lucius regarded him as his best partner, and Lily was his only opponent. When everyone thought he was just a madman addicted to potions, he had already strangled the lifeblood of the entire magical world.