In a future where a psionic hormone unlocks extra-sensory abilities, humanity faces a dire threat from terrifying mutants known as Others, who descend from the sky in search of human brains. With conventional weapons ineffective, those endowed with psionic powers are humanity's only hope. Join the Other Suppression Force (OSF) and choose to experience the story through either Yuito Sumeragi, an enthusiastic recruit from a prestigious lineage, or the enigmatic Kasane Randall with her acclaimed skills. As their paths intertwine, unravel the mysteries of this Brain Punk world where technology and psychic powers collide.