Takahashi Tanjiro, a 15 year old middle school student was bored of his usual life hoping for it to change in highschool, but as he goes to sleep to wake up for the first day of his highschool, realises that he skipped a complete year and is a second year student instead.

A quiet, invisible high school student has spent years watching bullies destroy his classmates while he remains safely in the shadows. When he finally finds the courage to intervene, it costs him everything. Broken and bleeding in the forest, he discovers something that will change the rules fore...