Individuals known as Assassins possess extraordinary abilities that they employ to carry out lethal acts, with the most hazardous among them being the Assassin of Crimson. Once the chief of the Yuuyami, an assassin guild, the murderer of the nation's leader, King Mars. Following this atrocity, the country's princess has offered a substantial reward and the chance to wed her, becoming the subsequent monarch, to whomever apprehends the assassin.
Virgil, a red-haired individual who is often mistaken for a female, accompanies a group of performers as they search for his twin brother, Serge. His unusual characteristics correspond to those of the infamous Assassin of Crimson, leading him down a path that unravels the enigma surrounding the deceased king and exposes the identity of the Assassin of Crimson.
