[Machine Translation] There was a case of a street attack that attacked only elementary school students! The incidents escalate, with people being beaten with baseball bats and stabbed with knives. In order to catch the culprit, the elementary school students formed a detective team! At the same time, Mitsugi, who was asked to investigate a junior high school student's affair with his girlfriend, was unexpectedly caught by the police...! The 2A Detective Agency, as well as our own Eiji and Yasunaga, also cooperate in the investigation. The culprit is an unexpected person! 2A Detective Bureau, Vol. 7! From upper elementary school.