第 1 集: 埼玉反思在擁有壓倒性一拳英雄實力後，意義的喪失
2015年10月5日 播出
Saitama is a guy who's a hero for fun. After saving a child from certain death, he decided to become a hero and trained hard for three years. Though he's now so strong he can defeat any opponent with a single punch, lately he feels as if, in exchange for overwhelming power, he's lost something even more important. (Source: Daisuki)