World's End Harem: Fantasia Vol. 8

While visiting Isteshia to attend Gavial's Kenshin ceremony, Arc discovers the crown prince of the Madilis Empire, Deutius, in attendance as well. Learning that his beloved Aurelia has been placed under a deadly spell by Deutius's own hand, Arc embraces his dark power and casts a curse of death on the prince! What will happen to Arc after committing such a heinous act?