That underdeveloped human being, Yamashita Taro, is back! A generation ago, Taro was called the worst baseball player in history, but he became the pitcher who won the Koshien tournament. However, he injured his shoulder and had to leave baseball, and 10 years later, he was unemployed and in the worst position. Then, one day, he happened to drop in on an amateur baseball game, and through that connection, he became a temporary editorial staff member at Oyamada Publishing. To his surprise, Tatsumi, his former teammate from the Kaiku High School baseball team, also works there!