Chapter 6 begins with a flashback to the time when the king's daughter, Arisa, was a student at the school. The flashback reveals that the student's name is Hiroyuki, and that he is a member of the class of 2, the school's second-most popular class. He is the son of Hiroyuki's father, who was the king of Japan during the reign of Hirohito, the current emperor of Japan. The chapter ends with Hiroyuki and his friend, the student president of the second class, discussing the upcoming trip they will take together to the island of Ibaraki. Hiroyuki tells his friend that he has a secret that he wants to share with the other students, and the two of them decide to share it with each other.