Saiki Kusou, the most powerful psychic to ever be beknownst to all life. A 16y/o boy, incapable of affection, meets a female psychic who seems to think just like him. From understanding the world and how it is as a psychic, she understands fully. Never had both parties truly felt happiness in this world. "I am the most unhappiest person." "Let's change that!" ... What is their story?