During the LoveLive Era, a kingdom is well-known because wealthy, royalties and noble families live on it. One day, Ryuu Yazawa the king of the Akihabara Kingdom made a decision and became a tradition and passed through to the royal family' generations. According to traditions, the first born princess would neccessarily marry the person who will steal her first kiss on the lips. On the other hand, the current king and queen died and left their one and only daughter Nico Yazawa.