“Actually, I have someone in mind.”
Madoka Kuga, Mushiki's older sister and Ruri's older sister, came to visit.
When she asks him why he transferred schools, he reveals that he likes someone, but
In order to convince Madoka, who is not convinced, we decide to introduce Kuozaki Saika.
〈Garden of Void〉 Cultural Festival─ Musiki invites his older sister to the garden soiree.
He greets Madoka in the form of Saika, but… … .
“What are you doing…? Musiki.”
Somehow, his identity is revealed at a glance?!
In a desperate situation, Karasuma Kuroe calls himself "Kuozaki Saika"
"older brother.
─Please give me Mr. Musiki.”
Reverse proposal?!

With marriage at stake, a cultural festival battle between the strongest "magician" and his "human" guardian breaks out!