I'll Let You Go Undercover at Hogwarts, and You'll Be the Principal

Link travels through the magical world of England in the 1970s and becomes a classmate of Harry Potter's parents, but his identity is an undercover Death Eater at Hogwarts! In order to prevent Harry Potter from doing anything bad, he had to cut off Lily first! Then by unlocking one of the Eight Wonders every year, Link was completely successful at Hogwarts! Voldemort: Let me tell you something, Link swallowed all my Horcruxes with the Soul-Conquering General, and kept encouraging me to make new Horcruxes. He is the Dark Lord, right? Dumbledore: So many powerful spells were thrown out like beans by Link, who mastered the Heavenly Barrier. The title of the First White Wizard should be given to Link! Nicoléme: The magic stone is nothing. Link used his magic machine to transform Muggles into wizards. This is the pinnacle of alchemy! Link: I have been lying in peace for three years and three years. If the First Wizarding War doesn't start, they will make me a prostitute directly after graduation! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.