As the head of an exclusive Singing School that travels the world for charity, Fiasse is a well-known vocalist. However, since receiving an unusual inheritance from her mother after her passing, she has gained unwanted attention from shady figures. To ensure her safety, Ellis and two skilled swordsmen, Kyoya and Miyuki, have been tasked with protecting her. Despite the upcoming World Tour, Fiasse is determined to perform with her friends watching over her every move.