My Teacher Kurosawa [KotoShin]

He wakes up as an elementary school student, and the high school detective swears he'll catch the man who knocked him out: Gin!

"Class, let me introduce your new teacher. This is Mr. Kurosawa, standing beside me. He'll be teaching PE starting today, so make sure you behave!"

"..."

"..."

...What kind of teacher is that?! Isn't he Gin?!

Reporting a killer impersonating a teacher! Please call the police and arrest him!

Waking up to receive an absurd order, Gin is not happy. But protesting is useless, so he can only follow the sound of someone's laughter into... an elementary school.

"..."

"..."

The public safety situation in Beika Town is terrible!

Also, is a kid with glasses some kind of recurring NPC? Why does he show up everywhere?

Note: The story won't loop through the year Conan began. Shinichi will return to normal later, and Gin's time as a teacher will be brief. There will be no romantic tension between teacher and student. Most of the story focuses on the Red and Black sides' battles. Gin seems inclined to switch sides, so he may not be entirely Black. Happy ending.

(The author changed their mind and removed the Jujutsu Kaisen and Katekyo Hitman Reborn arcs.)

Theme: Even so, you still have to study hard