Ayanokoji Has always been able to see Cursed Spirits. Eventually, he reflexively learned to fight them while in the Whiteroom. Some of his classmates also could see them but didn't have the resolve to fight them and would run away. Ayanokoji has now enrolled in ANHS away from the White Room and its Mental, Physical and Spiritual Horrors but everything will change when his schoolmates find an object hidden in the school.

Hey guys this is basically everything that happens before the great ninja war