After years of frustration, Kim Gidoo is about to have his first time with the girl he loves. But then, he’s kidnapped by a group of suspicious people, and learns that he’s to become a hero thanks to his super-powered sperm…

In a dystopian future in which robots are becoming increasingly commonplace, a young boy named Hogu lives in near poverty with his grandmother and sister. Though he innately possesses a kind soul, he is ostracized by his classmates and frequently bullied. At the beginning of the story, we find Hogu, friendless and alone – until he meets a robot girl…and our story begins.