A high school-student romance story with hentai elements. A prequel to Classmates 2. A kind of vinaigrette with the girls from Yasuhachi High School. Some discrepancies with the original plot are noticed: the girls, who in "Classmates 2" were barely acquainted or never met at all, became good friends. But it is not that important because here is a completely different main character - a good guy, not a fool, a university student, but not at all combative. Girls gladly call him an older friend, a "sempai", but can he get the one he fell in love with to call him something more?