Yamato's family moves from Nami Island to Tokyo. Yamato is the Tokai regional boxing champion. When Yamato arrives at his new school he is shocked to discover that the class was mostly girls. He soon finds out that there some boys there but that there were only nine. He also learns that the girls are the main power in the school, and becomes enraged by this when he is ordered by some girls to clean the girls washroom. He bluntly denies and snaps back at them telling them to clean the washroom. Soon after Yamato engages in a type of war against the girls where he begins to secure a place of power for the boys and even creates a boxing club. Yamato is shown to be extremely strong and quick, as shown when he is able to put a sizeable dent on the class blackboard with his bare hands and knock out an opponent in 10 seconds. Over time however an assortment of girls throughout the school begins to have crushes on him. He is shown as a popular person later in the manga and has not yet formed any love relationships with anyone in the school.