Wataru is shocked one day when he sees that Isumi is wearing a different school's uniform and can even get from one point to another without getting lost. Wataru seeks help from Nagi, but she thinks that the question is incomprehensive. Eventually going to the high school he saw Isumi go to earlier. Hayate and Saki hid themselves watching Wataru standing at the bus stop to Shiomi high school, and Hayate heard that name before because it is his former school...