After stealing the Tara Mask from the Shadow Kingdom.

Traveled to the world of Detective Conan and became the cousin of Maori Ran.

"The Shadow Legion, come out to pick up the corpses."

"Shadow Legion, go deliver an explosive gift pack to Gin."

······

"Hello, Mr. Mori Shun, how did you surpass Kudo Shinichi and become the savior of the Japanese police?"

"Hello Mr. Mori Shun, what do you think about those high school detectives calling you a 'cheat'?"

······

Watch how I, Maori Shun, rebuild the Shadow Legion in the world of science and how I become an intelligence businessman and a famous detective.

"Dumbledore, hasn’t he already graduated? Why is he back at school?"

"Oh, Severus, don’t be so nervous. He’s the new Defense Against the Dark Arts professor!"

"Damn it! If I catch him using a cauldron to cook hot pot at school again, I swear I’ll duel him!"

...

"You are the worst class I have ever taught!"

"But, Professor… isn’t this your first class?"

...

"Miss Granger, as the study committee leader, you’ll guide everyone to read by the Black Lake every morning."

"Mr. Potter, as the sports committee leader, after reading, take them for a run around the Black Lake!"

...

"The countdown to the O.W.L. exams is 100 days!"

"Break the cauldrons, sink the boats—fight for full marks on the O.W.L.s!"

Douglas Holmes, a Hufflepuff with an Eastern soul, returns to Hogwarts three years after graduation to apply for a teaching position—

and brings a whole new style to the school.