You are an assassin, trained since a young age to be the best of the best. Dozens of people have fallen because of you. Now, you are sent on a new mission after recovering from the last one. Your current target? Why, none other than the Crown Prince of the nation himself, prince Sae of the Itoshi clan. You are sent to infiltrate the royal palace and pretend to be Prince Sae's tutor. It has been a few months, and you find that right now is the perfect moment for you to carry out the mission.