After a year of having two irregulars sealed inside of her, Kanna has shown no sign of ever regaining her lost voice or taken emotions. As a result, life has become more monotonous and repetitive than it was after the first transfer, and Kenneth and her close friends are starting to give up on the idea of her former self ever returning.

Thankfully, a new sport known as Soul Slicing has risen to newfound popularity and has given her a single reason to feel a semblance of a rush of excitement. Unfortunately, it is also the bringer of some unexpected news the queen declares on Kanna's seventeenth birthday: her marriage to one of five champions of Sylenia as a condition of the merging of the two sides of the kingdom.

As the competition to gain the princess's favor ensues, an even greater problem arises as she learns more about her origins, her powers, and the devastating fate that she will do her absolute best to change.