Your second year at Kimetsu Academy isn't going as you had hoped. Bullies, school uniforms, boring classes, strict teachers, things like that.

Well, you have one class that you look forward to every day.

History.

Kyojuro Rengoku, your History teacher is super fun. Everybody loves his class. It's never boring because of his passion for teaching and his love of history. He began hurling his students and starting Sparring battles during class. He's loved by all students (especially the females), and nobody in the Academy has bad grades in History. And you have bad grades in every class. Except History.