The new semester starts and on the bus to school Saku notices a tall man also getting off at the school. During the welcome back ceremony, the man that Saku saw earlier is introduced as a new teacher named Nozomu SÅma who is in charge of Saku's class and world history. Mihoshi calls him "Sö-nii" in front of everyone and rumors abound as to what their relationship is. Later, Söma becomes the astronomy club's adviser and he explains to the others how Mihoshi's father was his professor at college and also the club adviser for their astronomy club...