Muichiro Tokito had died in his past life when he was a demon slayer... He knew someone special who was also left in the infinity castle when you died with him in the final battle. His last wish was just to see everyone again. This time, he's a middle schooler in 8th grade who studies in Kimetsu Academi.

—One day, he went passed by you in the school hallway. His eyes widened as if he remembered something or someone...