The third season of One Punch Man. Saitama is a hero who only became a hero for fun. After three years of "special training," 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. Alongside Genos, his faithful disciple, Saitama performs his official hero duties as a member of the Hero Association. One day, monsters claiming to be from the Monster Association suddenly appeared, taking a child of Hero Association executive hostage. The S-class heroes gather and plan a raid on the Monster Association hideout to rescue the hostage. Meanwhile, Garou, a "human monster" who was taken by the Monster Association during a battle with the heroes, awakens in the Monster Association hideout.

A boy is walking home through the city where he finds a new path that he follows. It starts to rain and he seeks shelter with the aid of a girl. He falls in love with the girl. He gets a feather, and if he always carries it, they will meet again. He returns to his home following the path, but the next day he cant find it again. Time progresses and he forgets the girl. 50 years later he returns to the same city and he dreams of the girl. He is still dutifully carrying the feather. Written, drawn, and directed by famed illustrator Yoshitaka Amano.

Taking place in a very distant in future, the adventure begins when a boy meets a certain girl. The Pan Galaxy Republic has declined and so have many empires. This resulted to people in the galaxy being scattered. Living in the peaceful side of their world, Banjou, who picks up trashes at the spherical wall met a girl, frozen, in a broken spaceship. There are bad guys who chase her, and thus, the quiet galaxy suddenly became lively. Little did he know that the frozen girl is Goza 168th, the key to decide the destiny of the whole universe. Overcoming hardship, the two embarks on a trip to make the Galaxy Republic alive again. It may be a difficult challenge, but it's alright, let's progress slowly! A comedy of irresponsible galaxy trip begins! (Source: MAL News)