In episode 9, titled "The Greatest Singer in the Empire Is Born!", Ageha presents Princess Hyakka with a peony hair ornament as a gift.

Ageha's gift of the peony hair ornament to Princess Hyakka in episode 9 strengthens their relationship, which is significant as Hyakka takes an interest in Ageha's origami and supports his ideas, such as mass education and innovations like letterpress printing.

Hyakka supports Ageha's vision for mass education and innovation; after receiving the peony hair ornament, she promises to pass on the idea of letterpress printing to Igor, the God of Innovation, which could enable mass production of books and scripts for plays, potentially allowing her to see an opera one day.

In episode 9, Ageha becomes so excited and stressed about his plans for education and innovation that he passes out from stress-induced fever, highlighting his fragile health and the emotional burden he carries.

While episode 9 focuses more on Ageha's interactions with Princess Hyakka and his educational plans, the ongoing background plot involves Ageha raising his half-brother Regulus, whom he knows will eventually try to kill him for the family title, adding tension and complexity to their relationship.