A manner movie collaboration between and which was shown before theater screenings of .

Alicepia, a land of wonder that has existed somewhere in the world since ancient times, was once home to loving inhabitants known as the Alicepians. Their peaceful lives were disrupted when a mysterious monster, Jamaock, began to appear, threatening the sparkling brilliance of their homeland. If nothing is done, Alyspia will lose its radiance forever. This is the story of the "Princesses," whose unwavering songs of courage and hope shine even in the darkest times. A pop-song fantasia filled with energy and bravery -- Princession Orchestra!

The story follows Hajime Sekiguchi, a former life insurance salesman who, in a moment of desperation, makes the unexpected leap into the world of hosts. At Club One, Hajime finds himself surrounded by a cast of eccentric personalities: a "younger brother" type host with 20 years of experience, a former idol specializing in romantic sales tactics, and a hyper-aggressive host obsessed with mobile games. Despite thinking, "This isn't a job for anyone with a sane mind," Hajime uses his polished insurance sales skills to attract clients and carve out a surprising niche for himself.

Next to Miyu Suzuki, a trendy and bubbly high school girl, sits Yuusuke Tani, a quiet and frank boy. Their interactions are brief, limited to Suzuki's unprompted random questions and Tani's succinct answers. Yet, beneath these simple exchanges, feelings of love are quietly blossoming. Suzuki sees Tani for who he is: a straightforward boy who respects everyone equally, completely unconcerned about fitting in. Unlike Tani, she is too hung up on what everyone else thinks, desperate to keep her crush a secret. However, a slight misunderstanding leads to Suzuki confessing her feelings—and to her delight, Tani feels the same. Jittery with excitement, the young couple starts dating, embarking on a wonderful journey of friendship and love.