The Hanninozuka family has been helping the nations for as long as they have been established, supplying them with certain forces. With a new heir the haven't met just about to graduate high school, Austria and Germany arranged to have three nations attend the school to get to know him unprofessionally. How will the three nations react? What is going to happen? Is this going to be cliché? I can only answer the third, no. (More information in prologue!)