Teyvat: the Fugitive Professor of Hogwarts

Thanos D. Geranjh Diroys, 21 years old, graduated from Hogwarts School of Witchcraft and Wizardry and Hufflepuff House, and is a professor of Defense Against the Dark Arts at Hogwarts. His most commendable achievement was slaying the Dark Lord in a one-on-one duel. A few years later, during a time and space magic experiment conducted in cooperation with the Ministry of Magic, he was hit by some new and unknown magic, causing him to disappear. Principal Dumbledore expressed great sadness at this sad news and sent invitations to teach the Defense Against the Dark Arts class at Hogwarts to many well-known wizards. And the Defense Against the Dark Arts professor who had been unilaterally "resigned" came to a world that was both familiar and unfamiliar to him alone at this moment - the Seven Elements Teyvat Continent.