Igarashi Fumihiko Liangichi, who passed the judicial exam before graduation and is known as a "genius", suddenly knocked on the door of the Wrestling Research Society (HWA for short). The famous scholar in the school came to visit, which surprised the members. Liangichi told them that he was so moved by the student wrestling match at the school festival last year that he had always wanted to join HWA. As a result, Liang Yi became a member of HWA. He learns things very seriously and often takes out a notebook to take notes, but he can't remember some basic little things. Soon after, Liangyi ushered in the debut battle-a wrestling match held in the shopping street of the community. It was supposed to be an entertainment activity, but Liangyi's serious and tenacious style of play infected the audience, and he suddenly became a famous wrestler. Liangyi's sister Qian also came to watch the game. She told her brother's secret to Asaoko Asaoka and other members of the HWA. It turns out that Liangyi hit his head in a bicycle accident and has since suffered from a rare disease-"high-order brain dysfunction". He remembers everything before the accident, but he has only one day's memory after the accident. No matter what happened that day, when I woke up the next day, everything was blank. Only then do we understand why Liangyi always forgets some little things.