The adorable shrine maiden Fuzuki Kanon has at last been summoned, and she brings with her hope that the demon lord will finally be eradicated. However, when agents of Lapter sneak into the castle in an attempted assassination, the sealing stone breaks! And since Rosemary is the closest person to the stone when it happens, she becomes the prime suspect for the demon lordâs possessed vessel. Meanwhile, Nevel begins their counterattack on Lapter, shattering the peace that the world has enjoyed for so long. To make matters worse, Sir Leonhart has grown distant, occupied by his knightly duties. Countering Lapterâs skullduggery, pinning down the demon lord, and getting through to Sir Leonhartâcan Rosemary resolve all these issues before sheâs married off to another countryâs prince?