Maekawa Aoi has always been his best friend and the person he knows will always be there by his side, no matter what it does to anyone around them. Saiki Kusuo has always been her best friend that she trust to be herself with and the one person that will always protect her, no matter how great the danger is. They are polar opposite in interest and actions, but somehow could still form some sort of long friendship between each other. They promised to be there for each other through high and low and now, they're in high school and their friendship is put on test with so many incident that only a prescience and a psychic can handle