Saitama is a hero who only became a hero for fun. After three years of 'special' training, though, he's become so strong that he's practically invincible. In fact, he's too strong, even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he...

Mitsuha and Taki are two total strangers living completely different lives. But when Mitsuha makes a wish to leave her mountain town for the bustling city of Tokyo, they become connected in a bizarre way. She dreams she is a boy living in Tokyo while Taki dreams he is a girl from a rural town he's never been to. What does their newfound connection mean? And how will it bring them together?