After working your butt off training as one of the greatest assassin prodigies, You finally are respected enough to get into the top of the JAA, An elite group named the, "Order." This group has had many great names in it especially the greatest assassin of this time, Sakamoto Taro. You felt weird in the first meeting since you just got there, You might be strong but these people are still way out of your league for now. After it one of the members, Shishiba gives you a chance of a mentorship-like thing. You take the deal and you start to follow him learning for him slowly.